Method for dyeing keratinous fibers

Abstract

Method for dyeing keratinous fibers, in particular human hair, comprising the following steps in the order indicated: (1) Application of a pretreatment agent (V) to the keratinous fibers, wherein the

Description

Technical Field The subject-matter of the present application is a method for treating keratinous fibers, in particular human hair, which comprises the application of a pretreatment agent (V), the application of a coloring agent (F) and optionally the application of a post-treatment agent (N). The pretreatment agent (V) is characterized by its content of at least one Cs-C24-alkyl carboxylic acid and / or its salt. The colorant contains at least one coloring compound from the group of pigments and directdrawing dyes. Furthermore, at least one of the agents (F) and / or (N) contains an organic Ci-Ce-alkoxy-silane, and there is no washing step between the application of the pretreatment agent (V) and the colorant (F). A second subject-matter of the present application is a pretreatment agent (V) comprising the Cs-C24-alkyl carboxylic acid(s) and / or salts thereof in a solvent-based cosmetic carrier. Background The change in shape and color of keratin fibers, especially hair, is an important area of modern cosmetics. To change the hair color, the expert knows various coloring systems depending on coloring requirements. Oxidation dyes are usually used for permanent, intensive dyeings with good fastness properties and good grey coverage. Such colorants usually contain oxidation dye precursors, known as developer components and coupler components, which form the actual dyes when exposed to oxidizing agents such as hydrogen peroxide. Oxidation dyes are characterized by very long-lasting dyeing results. When direct-drawing dyes are used, ready-made dyes diffuse from the colorant into the hair fiber. Compared to oxidative hair dyeing, the dyeings obtained with direct-drawing dyes have a shorter shelf life and quicker washability. Colorations with direct-drawing dyes usually remain on the hair for a period of between 5 and 20 washes. The use of color pigments is known for short-term color changes on the hair and / or skin. Color pigments are generally understood to be insoluble, coloring substances. These are present undissolved in the dye formulation in the form of small particles and are only deposited from the outside on the hair fibers and / or the skin surface. Therefore, they can usually be removed without residue by a few washes with surfactant-containing cleaning agents. Various products of this type are available on the market under the name hair mascara. If the user wants particularly long-lasting coloring, the use of oxidative colorants has been their only option up to now. However, despite numerous optimization attempts, an unpleasant ammonia or amine odor cannot be completely avoided in oxidative hair dyeing. The hair damage still associated with the use of oxidative dyes also has a negative effect on the user’s hair. EP 2168633 B1 deals with the task of producing long-lasting hair colorations using pigments. The paper teaches that when the combination of a pigment, an organic silicon compound, a film-forming polymer and a solvent is used on hair, it is possible to produce colorations that are particularly resistant to abrasion and / or shampooing. There is a need to provide hair dyes with pigments that, on the one hand, have high wash and rub fastness and, on the other hand, do not negatively affect hair properties such as manageability and haptic feel. For this purpose, it would be desirable to obtain intense colorations by a good and uniform coating of the pigments on the keratinous material. Accordingly, the objective of the present invention was to provide a dyeing system with pigments and / or direct-drawing dyes that has fastness properties comparable to those of oxidative dyeing. Wash fastness properties in particular should be outstanding, but the use of oxidation dye precursors normally used for this purpose should be avoided. There was also a particular focus on creating even, long-lasting dyeing with the best possible wash fastness. Detailed Description Surprisingly, it has now been discovered that the aforementioned task can be solved excellently if keratinous fibers, in particular human hair, are dyed using a process in which, in a first step (1), a pretreatment agent (V) is first applied to the keratinous fibers, followed by a colorant (F) in step (2). Optionally, a post-treatment agent (N) can also be applied afterwards. The pretreatment agent (V) contains at least one linear or branched, saturated or mono or polyunsaturated alkyl carboxylic acid with 8 to 24 carbon atoms and / or its salt (V1). The colorant (F) contains at least one coloring compound from the group consisting of pigments and directdrawing dyes (F1). Furthermore, it is characteristic of the method that at least one of the agents (F) and / or (N) contains at least one organic Ci-Ce-alkoxy silane and / or its hydrolysis and / or condensation products, and that nowashing step is carried out between steps (1) and (2). By pretreating the keratinous fibers with the pretreatment agent (V), a surprisingly uniform and long-lasting coating of the coloring compound (F1) could be achieved, and the coloring compounds could form a particularly stable and uniform film together with the organic Ci-Ce-alkoxy silanes. A first subject-matter of the present invention is a method for dyeing keratinous fibers, in particular human hair, comprising the following steps in the order indicated: (1) applying a pretreatment agent (V) to the keratinous fibers, wherein the pretreatment agent (V) contains: (V1) at least one linear or branched, saturated or mono or polyunsaturated alkyl carboxylic acid having 8 to 24 carbon atoms and / or a salt thereof, (2) applying a colorant (F) to the keratinous fibers, wherein the colorant (F) contains: (F1) at least one coloring compound from the group consisting of pigments and directdrawing dyes, (3) If necessary, application of a post-treatment agent (N) on the keratinous fibers, - wherein at least one of the agents (F) and / or (N) contains at least one organic Ci-Ce-alkoxy silane and / or its hydrolysis and / or condensation products, and - wherein no washing step takes place between steps (1) and (2). The work leading to this invention has shown that the successive application of agents (V), (F) and, where appropriate, (N) enables the production of very stable and wash-fast colors on keratinous fibers. The application of the organic Ci-Ce-alkoxy silane in the dyeing agent (F) and / or in the posttreatment agent (N) leads to the formation of a particularly resistant film on the keratinous fibers. Colored films can be obtained by using at least one coloring compound from the group of pigments and / or direct-drawing dyes in the colorant (F), or the coloring compounds are first deposited on the keratin fibers and are sealed with a film by the organic Ci-Ce-alkoxy silane(s). The coloring compounds can be permanently fixed to the keratinous fiber in this way, resulting in extremely wash-fast colors with good resistance to abrasion and / or shampooing. With the help of the pretreatment agent (V), the deposition of the coloring compounds on the fibers was significantly increased and particularly homogeneous. It is assumed that the pretreatment agent (V) can level the surface of the keratinous fibers particularly well and thus ensures that the colorant (F) interacts very evenly with areas of the keratin fibers that are damaged to varying degrees. Keratin fibers Keratin fibers include hair, but also wool, fur and feathers. Human hair is considered to be the most desirable type of keratinous fiber. Pretreatment agent (V) In the first step of the method according to the invention, the pretreatment agent (V) is applied to the keratinous fibers. As an essential ingredient (V1), the pretreatment agent (V) contains at least one linear or branched, saturated or mono or polyunsaturated alkyl carboxylic acid with 8 to 24 carbon atoms and / or its salt. Alkyl carboxylic acids with 8 to 24 carbon atoms can alternatively also be referred to as fatty acids. According to the invention, fatty acids are to be understood as saturated or unsaturated, unbranched or branched, unsubstituted or substituted C8-C24 carboxylic acids. Unsaturated fatty acids can be mono or polyunsaturated. For an unsaturated fatty acid, its C-C double bond(s) may have Cis or Trans configuration. Unsubstituted alkyl carboxylic acids with 8 to 24 carbon atoms have proven to be particularly suitable. Unsubstituted alkyl carboxylic acids have no functional groups other than the carboxyl group, which can be protonated or deprotonated. Alternatively, unbranched fatty acids can also be referred to as linear fatty acids, i.e. these fatty acids are not branched. Particularly suitable alkyl carboxylic acids with 8 to 24 carbon atoms can be selected, for example, from the group consisting of dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic acid), isostearic acid (16-methylheptadecanoic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), petroselinic acid [(Z)-6-octadecenoic acid], palmitoleic acid [(9Z)-hexadec-9-enoic acid], oleic acid [(9Z)-octadec-9-enoic acid], elaidic acid [(9E)-octadec-9-enoic acid], erucic acid [(13Z)-docos-13-enoic acid], linoleic acid [(9Z, 12Z)-octadeca-9,12-dienoic acid, Linolenic acid [(9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid, elaeostearic acid [(9Z, 11E,13E)-octadeca-9,11,3-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoic acid] and nervonic acid [(15Z)-tetracos-15-enoic acid]. In a particularly preferred embodiment, a method according to the invention is characterized in that the pretreatment agent (V) contains at least one C8-C24 alkyl carboxylic acid (V1) selected from the group consisting of dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic acid), isostearic acid (16-methylheptadecanoic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), petroselinic acid [(Z)-6-octadecenoic acid], palmitoleic acid [(9Z)-hexadec-9-enoic acid], oleic acid [(9Z)-octadec-9-enoic acid], elaidic acid [(9E)-octadec-9-enoic acid], erucic acid [(13Z)-docos-13-enoic acid], linoleic acid [(9Z, 12Z)-octadeca-9,12-dienoic acid, Linolenic acid [(9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid, elaeostearic acid [(9Z,11E,13E)-octadeca-9,11,3-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoic acid], nervonic acid [(15Z)-tetracos-15-enoic acid] and / or their salts. In a particularly preferred embodiment, a method according to the invention is characterized in that the pretreatment agent (V) contains at least one C8-C24 alkyl carboxylic acid from the group consisting of lauric acid, myristic acid, palmitic acid, lignoceric acid, stearic acid, isostearic acid, arachidic acid, behenic acid, petroselinic acid, palmitoleic acid, oleic acid, elaidic acid, erucic acid, linoleic acid, linolenic acid, elaeostearic acid, arachidonic acid, nervonic acid and / or salts thereof. Stearic acid, isostearic acid and / or the salts of these acids are most preferred. Stearic acid (octadecanoic acid or n-octadecanoic acid) has the CAS number 57-11-4. Isostearic acid (16-methylheptadecanoic acid) has the CAS number 2724-58-5. Lauric acid (dodecanoic acid) has the CAS number 143-07-7. Myristic acid (tetradecanoic acid) has the CAS number 544-63-8. Palmitic acid (hexadecanoic acid) has the CAS number 57-10-3. Lignoceric acid (tetracontanoic acid) has the CAS number 557-59-5. Eicosanoic acid (arachidic acid) has the CAS number 506-30-9. Behenic acid (docosanoic acid) has the CAS number 112-85-6. Petroselinic acid ((6Z)-octadec-6-enoic acid) has the CAS number 593-39-5. Palmitoleic acid (cis-9-hexadecenoic acid) has the CAS number 373-49-9. Oleic acid ((9Z)-octadec-9-enoic acid) has the CAS number 112-80-1. Elaidic acid ((9E)-octadec-9-enoic acid) has the CAS number 112-79-8. Erucic acid (13Z)-13-docosenoic acid has the CAS number 112-86-7. Linoleic acid ((9Z,12Z)-octadeca-9,12-dienoic acid) has the CAS number 60-33-3. Linolenic acid ((9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid) has the CAS number 463-40-1. Elaeostearic acid ((9Z,11E,13E)-octadeca-9,11,13-trienoic acid and (9E,11E,13E)-octadeca-9,11,13-trienoic acid) has the CAS numbers 506-23-0 and 544-73-0. Arachidonic acid ((5Z,8Z, 11Z,14Z)-eicosapentaenoic acid) has the CAS number 506-32-1. Nervonic acid ((Z)-15-tetracosenoic acid) has the CAS number 506-37-6. Suitable salts of Cs-C24-alkylcarboxylic acids (V1) are, for example, their sodium salts, potassium salts and ammonium salts. In these salts, the carboxyl groups of the fatty acids are deprotonated and are neutralized by the presence of a sodium ion, potassium ion or ammonium ion. To achieve a particularly uniform color result, it has been found to be preferable if the pretreatment agent (V) used in the process contains the Cs-C24-alkyl carboxylic acid(s) (V1) in certain quantity ranges. Accordingly, a process is particularly preferred in which the pretreatment agent (V) - based on the total weight of the pretreatment agent (V) - contains one or more C8-C24 alkyl carboxylic acids and / or their salts (V1) in a total amount of 0.1 to 15.0% by weight, preferably 0.5 to 10.0% by weight, more preferably from 2.0 to 8.0% by weight and most preferably from 3.0 to 7.0% by weight. In another particularly preferred embodiment, a process according to the invention is characterized in that the pretreatment agent (V) contains, based on the total weight of the pretreatment agent (V), one or more C8-C24 alkyl carboxylic acids and / or their salts (V1) in a total amount of 0.1 to 15.0% by weight, preferably 0.5 to 10.0% by weight, more preferably from 2.0 to 8.0% by weight and most preferably from 3.0 to 7.0% by weight. In a further explicitly particularly preferred embodiment, a method according to the invention is characterized in that the pretreatment agent (V) - based on the total weight of the pretreatment agent (V) - contains one or more Cs-C24-alkyl carboxylic acids from the group consisting of stearic acid, isostearic acid and / or their salts (V1) in a total amount of 0.1 to 15.0% by weight, preferably 0.5 to 10.0% by weight, more preferably 2.0 to 8.0% by weight and most preferably 3.0 to 7.0% by weight. Cosmetic carrier of the ore-treatment agent The pretreatment agent (V) contains the Cs-C24-alkyl carboxylic acid(s) (V1) preferably in a cosmetic carrier, particularly preferably in a suitable aqueous, alcoholic or aqueous-alcoholic carrier. Such carriers can be creams, emulsions, dispersions, gels or other preparations that are suitable for application to the hair. A carrier consisting of an organic solvent other than water has also proved to be particularly suitable. In a further particularly preferred embodiment, a pretreatment agent (V) according to the invention is therefore characterized in that it contains at least one solvent other than water from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxy alcohol, benzyl alcohol, poly-C<tgg 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate. The tests carried out have shown that ethanol is a particularly suitable cosmetic carrier for the pretreatment agent (V). Ethanol has the Cas number 64-17-5. Isopropanol is also known alternatively as 2-propanol and has the CAS number 67-63-0. 1,2-Propylene glycol is alternatively referred to as 1,2-propanediol and has CAS numbers 57-55-6 [(RS)-1,2-dihydroxypropane], 4254-14-2 [(R)-1,2-dihydroxypropane], and 4254-15-3 [(S)-1,2-dihyd roxypropane], 1,3-propanediol or 1,3-dihydroxypropane has the CAS number 504-63-2. Glycerol is also known alternatively as 1,2,3-propanetriol and has the CAS number 56-81-5. 1-Butanol can also be referred to as n-butanol or butyl alcohol and has the CAS number 71-36-3. Phenoxyethanol has the Cas number 122-99-6. Benzyl alcohol is also referred to as phenylmethanol and has the CAS number 100-51-6. Polyethylene glycols within the meaning of the present invention are preferably polymers that are liquid at room temperature (25°C) with the general molecular formula C2nH4n+2On+i. The repeating unit of the linearly structured polymer is (-CH2-CH2-O-), with a molar mass of approximately 44 g mor1. Chemically, it is a polyether. Polyethylene glycols are thus understood to be ethylene glycols of the formula (EG) HO—CH2— CH2—O--H X (EG), where x stands for an integer from 2 to 10,000, preferably for an integer from 2 to 1,000, and particularly preferably for an integer from 2 to 200. The solvent or solvents are preferably used in certain quantity ranges in the colorant (F). Particularly uniform and resistant colorations could be achieved when the pretreatment agent (V) -based on its total weight - contained one or more solvents (V2) other than water in a total amount of 1.0 to 99.0% by weight, preferably 10.0 to 98.5% by weight, more preferably from 30.0 to 98.0% by weight, even more preferably from 50.0 to 97.5% by weight, and most preferably from 70.0 to 97.0% by weight. In a further particularly preferred embodiment, a pre-treatment agent (V) used in the invention is characterized in that it contains, based on the total weight of the pretreatment agent (V), one or more solvents (V2) other than water in a total amount of 1.0 to 99.0% by weight, preferably 10.0 to 98.5% by weight, more preferably from 30.0 to 98.0% by weight, even more preferably from 50.0 to 97.5% by weight, and particularly preferably from 70.0 to 97.0% by weight. In a further particularly preferred embodiment, a method according to the invention is characterized in that the pretreatment agent (V) contains, based on the total weight of the pretreatment agent (V), one or more solvents (V2) from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerin, phenoxyethanol, benzyl alcohol, poly-C1-C6-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate, and glycerol carbonate in a total amount of 1.0 to 99.0% by weight, preferably 10.0 to 98.5% by weight, more preferably from 30.0 to 98.0% by weight, even more preferably from 50.0 to 97.5% by weight, and most preferably from 70.0 to 97.0% by weight. In the most preferred embodiment, a method according to the invention is characterized in that the pretreatment agent (V) - based on the total weight of the pretreatment agent (V)—contains 1.0 to 99.0% by weight, preferably 10.0 to 98.5% by weight, more preferably 30.0 to 98.0% by weight, even more preferably 50.0 to 97.5% by weight, and most preferably 70.0 to 97.0% by weight of ethanol. The pretreatment agent (V) may comprise, for example, 2.0 to 6.0% by weight of stearic acid and 94% to 98% by weight of ethanol. The pretreatment agent (V) may also comprise, for example, 3.0 to 7.0% by weight of stearic acid and 93% to 97% by weight of ethanol. The ethanol used can also be denatured and contain traces of water. Surface free energy (SFE) The surface free energy (SFE) of keratin fibers or hair influences how cosmetic formulations interact with the surface of the fibers during application. The surface energy can be used to assess the condition of hair, as healthy hair always has a lower surface energy than damaged hair. All cosmetic products that are applied to the hair surface change the surface energy of the hair. For example, to improve the conditioning performance of the hair, the formulations should modify the surface of the treated hair and make it more hydrophobic, which reduces the surface energy. According to J. Cosmet. Sci., 62, 127-137 (March / April 2011), the surface energy is determined using the Fowkes theory, in which the contact angles of the keratin fibers are first measured in two solvents (a non-polar and a polar solvent) and the surface energy is calculated using the Fowkes equation. In this application, water was used as the polar solvent and diiodomethane was used as the nonpolar solvent. In contact angle measurements, diiodomethane is used as a reference liquid for determining the surface energy of solids, as it has a relatively high surface tension for a non-polar liquid and therefore forms contact angles that are easy to measure. The Fowkes theory separates the surface energy into a dispersive component, which is due to the non-polar interaction at the interface, and a polar component, which is due to the polar interaction at the liquid-solid interface. Fowkes theory is a combination of three equations that describe the interfacial interactions between a liquid and a solid. With regard to the equations and the method for measuring and calculating the surface energy, reference is made in full to J. Cosmet. Sci., 62, 127-137 (March / April 2011). The experimental results of this literature review demonstrate that decreasing or increasing the surface energy of hair can be used to evaluate or screen the performance of cosmetic ingredients and formulations. In order for a colorant (F) applied to hair to provide the most uniform color result possible, all parts of the hair treated with the colorant should have as similar a surface energy (SFE) as possible. The SFE can be used to mathematically quantify how hydrophobic or hydrophilic the surface of the keratin fibers is. If all parts of the hair have a comparable SFE, it can be concluded that the hydrophobicity or hydrophilicity of these areas is also comparable. The skilled person can deduce from this that a coloring compound whose structure also has a certain hydrophobicity or hydrophilicity interacts equally strongly with all these areas and is deposited on these areas to a comparable extent. Matching the SFE is a challenge, especially when there are sections of hair with varying degrees of damage, as is the case with longer hair, for example. There is little or no damage to the hair at the roots, whereas the hair lengths generally show an increasing degree of damage with increasing length. It has been found that by using the pretreatment agent (V) according to the invention, the free surface energy of hairs of different types, but above all of hairs with different degrees of damage, can be equalized particularly well. This effect was surprising and unforeseeable for the expert. As a result of this adjustment, a particularly uniform and homogeneous surface coloration of the subsequently applied colorant was possible. Coloring agent (F) In the second step of the method according to the invention, the colorant (F) is applied to the keratinous fibers. The colorant (F) is characterized in that it contains at least one coloring compound (F1) from the group consisting of pigments and direct-drawing dyes. The use of pigments has proved to be particularly preferable in this context. In a further particularly preferred embodiment, a method according to the invention is characterized in that the colorant (F) contains at least one coloring compound from the group of pigments. Pigments within the meaning of the present invention are coloring compounds which have a solubility in water at 25°C of less than 0.5g / L, preferably less than 0.1 g / L, even more preferably less than 0.05g / L. Water solubility can be determined, for example, by the method described below: 0.5g of the pigment are weighed in a beaker. A magnetic stirrer is added. Then one liter of distilled water is added. This mixture is heated to 25°C for one hour while stirring on a magnetic stirrer. If undissolved components of the pigment are still visible in the mixture after this period, the solubility of the pigment is below 0.5g / L. If the pigment-water mixture cannot be assessed visually due to the high intensity of the possibly finely dispersed pigment, the mixture is filtered. If a proportion of undissolved pigments remains on the filter paper, the solubility of the pigment is below 0.5g / L. Suitable pigments can be of inorganic and / or organic origin. In a preferred embodiment, a method is characterized in that the colorant (F) contains at least one coloring compound from the group of inorganic and / or organic pigments. Preferred pigments are selected from synthetic or natural inorganic pigments. Inorganic pigments of natural origin can be produced, for example, from chalk, ochre, umber, green earth, fired Terra di Siena or graphite. Furthermore, black pigments such as iron oxide black, colored pigments such as ultramarine or iron oxide red, and fluorescent or phosphorescent pigments can be used as inorganic pigments. Particularly suitable are colored metal oxides, hydroxides and oxide hydrates, mixed-phase pigments, sulfur-containing silicates, silicates, metal sulphides, complex metal cyanides, metal sulphates, chromates and / or molybdates. Particularly preferred pigments are black iron oxide (Cl 77499), yellow iron oxide (Cl 77492), red and brown iron oxide (Cl 77491), manganese violet (Cl 77742), ultramarines (sodium aluminum sulfosilicates, Cl 77007, Pigment Blue 29), chromium oxide hydrate (CI77289), iron blue (ferric ferrocyanide, CI77510) and / or carmine (cochineal). Also particularly preferred pigments are colored pearlescent pigments. These are usually mica-and / or mica-based and can be coated with one or more metal oxides. Mica belongs to the layer silicates. The most important representatives of these silicates are muscovite, phlogopite, paragonite, biotite, lepidolite and margarite. To produce the pearlescent pigments in combination with metal oxides, the mica, mainly muscovite or phlogopite, is coated with a metal oxide. Accordingly, a preferred method is characterized in that the colorant (F) contains at least one coloring compound from the group of pigments selected from the group of colored metal oxides, metal hydroxides, metal oxide hydrates, silicates, metal sulfides, complex metal cyanides, metal sulfates, bronze pigments, and / or colored pigments based on natural or synthetic mica coated with at least one metal oxide and / or metal oxychloride. In a further preferred embodiment, the method is characterized in that the colorant (F) contains at least one coloring compound from the group of pigments selected from pigments based on natural or synthetic mica coated with one or more metal oxides from the group consisting of titanium dioxide (Cl 77891), black iron oxide (Cl 77499), yellow iron oxide (Cl 77492), red and / or brown iron oxide (Cl 77491, Cl 77499), manganese violet (Cl 77742), ultramarine (sodium aluminum sulfosilicates, Cl 77007, Pigment Blue 29), chromium oxide hydrate (Cl 77289), chromium oxide (Cl 77288) and / or iron blue (ferric ferrocyanide, Cl 77510). Other suitable pigments are based on metal oxide-coated platelet-shaped borosilicates. These are coated with tin oxide, iron oxide(s), silicon dioxide and / or titanium dioxide, for example. Such borosilicate-based pigments are available, for example, under the name MIRAGE from Eckart or Reflecks from BASF SE. In a further preferred embodiment, the colorant (F) is characterized in that it contains at least one coloring compound from the group of inorganic pigments selected from the group consisting of black iron oxide (Cl 77499), yellow iron oxide (Cl 77492), red iron oxide (Cl 77491), and mixtures thereof. Yellow iron oxide (or iron oxide yellow) is the name for FeO(OH), in the color index under C.l. Pigment Yellow 42 listed. Red iron oxide (or iron oxide red) is the name for Fe2O3, in the color index under C.l. Pigment Red 101 listed. Depending on the particle size, red iron oxide pigments can be adjusted to be very yellowish (small particle size) to very blueish (coarse particles). Black iron oxide (or iron oxide black) is listed in the Color Index under C.l. Pigment Black 11 listed. Iron oxide black is ferromagnetic. The chemical formula is often given as Fe3O4, in reality there is a solid solution of Fe2O3 and FeO with inverse spinel structure. Further black pigments are obtained by doping with chromium, copper or manganese. Brown Black Iron Oxide (or Iron Oxide Brown) usually does not refer to a defined pigment, but to a mixture of yellow, red and / or black iron oxide. Iron oxide pigments usually have particle diameters in the range of 2,000 to 4,000 nm. For some applications, especially for cosmetic purposes, it may be advantageous to use iron oxide pigments with significantly smaller particle diameters. Hair dyes containing iron oxide pigments with a particle diameter in the range of 100 to 1,000 nm, more preferably 150 nm to 700 nm, exhibit particularly good durability and high color intensity. Examples of particularly suitable pigments are commercially available under the trade names Rona®, Colorona®, Xirona®, Dichrona® and Timiron® from Merck, Ariabel® and Unipure® from Sensient, Prestige® or SynCrystal from Eckart Cosmetic Colors, Flamenco®, Cellini®, Cloisonne®, Duocrome®, Gemtone®, Timica®, MultiReflections, Chione from BASF SE and Sunshine® from Sunstar. Very particularly preferred pigments with the trade name Colorona® are, for example: Colorona Copper, Merck, MICA, Cl 77491 (IRON OXIDES) Colorona Copper Fine, Merck, MICA, Cl 77491 (IRON OXIDES) Colorona Passion Orange, Merck, Mica, Cl 77491 (Iron Oxides), Alumina Colorona Patina Silver, Merck, MICA, Cl 77499 (IRON OXIDES), Cl 77891 (TITANIUM DIOXIDE) Colorona RY, Merck, Cl 77891 (TITANIUM DIOXIDE), MICA, Cl 75470 (CARMINE) Colorona Oriental Beige, Merck, MICA, Cl 77891 (TITANIUM DIOXIDE), Cl 77491 (IRON OXIDES) Colorona Dark Blue, Merck, MICA, TITANIUM DIOXIDE, FERRIC FERROCYANIDE Colorona Chameleon, Merck, Cl 77491 (IRON OXIDES), MICA Colorona Aborigine Amber, Merck, MICA, Cl 77499 (IRON OXIDES), Cl 77891 (TITANIUM DIOXIDE) Colorona Blackstar Blue, Merck, Cl 77499 (IRON OXIDES), MICA Colorona Patagonian Purple, Merck, MICA, Cl 77491 (IRON OXIDES), Cl 77891 (TITANIUM DIOXIDE), Cl 77510 (FERRIC FERROCYANIDE) Colorona Red Brown, Merck, MICA, Cl 77491 (IRON OXIDES), Cl 77891 (TITANIUM DIOXIDE) Colorona Russet, Merck, Cl 77491 (TITANIUM DIOXIDE), MICA, Cl 77891 (IRON OXIDES) Colorona Imperial Red, Merck, MICA, TITANIUM DIOXIDE (Cl 77891), D&C RED NO. 30 (Cl 73360) Colorona Majestic Green, Merck, Cl 77891 (TITANIUM DIOXIDE), MICA, Cl 77288 (CHROMIUM OXIDE GREENS) Colorona Light Blue, Merck, MICA, TITANIUM DIOXIDE (Cl 77891), FERRIC FERROCYANIDE (Cl 77510) Colorona Red Gold, Merck, MICA, Cl 77891 (TITANIUM DIOXIDE), Cl 77491 (IRON OXIDES) Colorona Gold Plus MP 25, Merck, MICA, TITANIUM DIOXIDE (Cl 77891), IRON OXIDES (Cl 77491) Colorona Carmine Red, Merck, MICA, TITANIUM DIOXIDE, CARMINE Colorona Blackstar Green, Merck, MICA, Cl 77499 (IRON OXIDES) Colorona Bordeaux, Merck, MICA, Cl 77491 (IRON OXIDES) Colorona Bronze, Merck, MICA, Cl 77491 (IRON OXIDES) Colorona Bronze Fine, Merck, MICA, Cl 77491 (IRON OXIDES) Colorona Fine Gold MP 20, Merck, MICA, Cl 77891 (TITANIUM DIOXIDE), Cl 77491 (IRON OXIDES) Colorona Sienna Fine, Merck, Cl 77491 (IRON OXIDES), MICA Colorona Sienna, Merck, MICA, Cl 77491 (IRON OXIDES) Colorona Precious Gold, Merck, Mica, Cl 77891 (Titanium dioxide), Silica, Cl 77491 (Iron oxides), Tin oxide Colorona Sun Gold Sparkle MP 29, Merck, MICA, TITANIUM DIOXIDE, IRON OXIDES, MICA, Cl 77891, Cl 77491 (EU) Colorona Mica Black, Merck, Cl 77499 (Iron oxides), Mica, Cl 77891 (Titanium dioxide) Colorona Bright Gold, Merck, Mica, Cl 77891 (Titanium dioxide), Cl 77491 (Iron oxides) Colorona Blackstar Gold, Merck, MICA, Cl 77499 (IRON OXIDES) Colorona® SynCopper, Merck, Synthetic Fluorophlogopite (and) Iron Oxides Colorona® SynBronze, Merck, Synthetic Fluorphlogopite (and) Iron Oxides Further particularly preferred pigments with the trade name Xirona® are, for example: Xirona® Golden Sky, Merck, Silica, Cl 77891 (Titanium Dioxide), Tin Oxide Xirona® Caribbean Blue, Merck, Mica, Cl 77891 (Titanium Dioxide), Silica, Tin Oxide Xirona® Kiwi Rose, Merck, Silica, Cl 77891 (Titanium Dioxide), Tin Oxide Xirona® Magic Mauve, Merck, Silica, Cl 77891 (Titanium Dioxide), Tin Oxide Xirona® Le Rouge, Merck, Iron Oxides (and) Silica In addition, particularly preferred pigments with the trade name Unipure® are, for example: Unipure Red LC 381 EM, Sensient Cl 77491 (Iron Oxides), Silica Unipure Black LC 989 EM, Sensient, Cl 77499 (Iron Oxides), Silica Unipure Yellow LC 182 EM, Sensient, Cl 77492 (Iron Oxides), Silica Also particularly preferred pigments with the trade name Flamenco® are, for example: Flamenco® Summit Turquoise T30D, BASF, Titanium Dioxide (and) Mica Flamenco® Super Violet 530Z, BASF, Mica (and) Titanium Dioxide In the context of a further embodiment, the colorant (F) used in the process may also contain one or more coloring compounds from the group of organic pigments . The organic pigments are correspondingly insoluble organic dyes or colorants, which may be selected, for example, from the group of nitroso, nitro-azo, xanthene, anthraquinone, isoindolinone, isoindoline, quinacridone, perinone, perylene, diketopyrrolopyorrole, indigo, thioindido, dioxazine, and / or triarylmethane compounds. Examples of particularly suitable organic pigments are carmine, quinacridone, phthalocyanine, sorghum, blue pigments with the Color Index numbers Cl 42090, Cl 69800, Cl 69825, Cl 73000, Cl 74100, Cl 74160, yellow pigments with the Color Index numbers Cl 11680, Cl 11710, Cl 15985, Cl 19140, Cl 20040, Cl 21100, Cl 21108, Cl 47000, Cl 47005, green pigments with the Color Index numbers Cl 61565, Cl 61570, Cl 74260, orange pigments with the Color Index numbers Cl 11725, Cl 15510, Cl 45370, Cl 71105, red pigments with the Color Index numbers Cl 12085, Cl 12120, Cl 12370, Cl 12420, Cl 12490, Cl 14700, Cl 15525, Cl 15580, Cl 15620, Cl 15630, Cl 15800, Cl 15850, Cl 15865, Cl 15880, Cl 17200, Cl 26100, Cl 45380, Cl 45410, Cl 58000, Cl 73360, Cl 73915 and / or Cl 75470. In a further particularly preferred embodiment, the process is characterized in that the colorant (F) contains at least one coloring compound from the group of organic pigments selected from the group consisting of carmine, quinacridone, phthalocyanine, sorghum, blue pigments with the Color Index numbers Cl 42090, Cl 69800, Cl 69825, Cl 73000, Cl 74100, Cl 74160, yellow pigments with the Color Index numbers Cl 11680, Cl 11710, Cl 15985, Cl 19140, Cl 20040, Cl 21100, Cl 21108, Cl 47000, Cl 47005, green pigments with Color Index numbers Cl 61565, Cl 61570, Cl 74260, orange pigments with Color Index numbers Cl 11725, Cl 15510, Cl 45370, Cl 71105, red pigments with Color Index numbers Cl 12085, Cl 12120, Cl 12370, Cl 12420, Cl 12490, Cl 14700, Cl 15525, Cl 15580, Cl 15620, Cl 15630, Cl 15800, Cl 15850, Cl 15865, Cl 15880, Cl 17200, Cl 26100, Cl 45380, Cl 45410, Cl 58000, Cl 73360, Cl 73915, Cl 75470 and mixtures thereof. The organic pigment can also be a color paint. In the sense of the invention, the term color lacquer means particles comprising a layer of absorbed dyes, the unit of particle and dye being insoluble under the above mentioned conditions. The particles can, for example, be inorganic substrates, which can be aluminum, silica, calcium borosilate, calcium aluminum borosilicate or even aluminum. For example, alizarin color varnish can be used. Due to their excellent light and temperature resistance, the use of the aforementioned pigments in the colorant of the method according to the invention is particularly preferred. It is also preferred if the pigments used have a certain particle size. It is therefore advantageous according to the invention if the at least one pigment has a mean particle size Dso of 1.0 to 50pm, preferably 5.0 to 45pm, preferably 10 to 40pm, in particular 14 to 30pm. The average particle size Dso can be determined, for example, using dynamic light scattering (DLS). Pigments with a specific shape can also be used to color the keratin fibers. For example, a pigment based on a lamellar and / or a lenticular substrate platelet can be used. Furthermore, coloring based on a substrate platelet comprising a vacuum metallized pigment is also possible. In a further preferred embodiment, an agent according to the invention is characterized in that it comprises at least one pigment selected from the group consisting of pigments based on a lamellar substrate platelet, pigments based on a lenticular substrate platelet and vacuum metallized pigments. The substrate platelets of this type have an average thickness of at most 50 nm, preferably less than 30 nm, particularly preferably at most 25 nm, for example at most 20 nm. The average thickness of the substrate platelets is at least 1 nm, preferably at least 2.5 nm, particularly preferably at least 5 nm, for example at least 10 nm. Preferred ranges for substrate wafer thickness are 2.5 to 50 nm, 5 to 50 nm, 10 to 50 nm; 2.5 to 30 nm, 5 to 30 nm, 10 to 30 nm; 2.5 to 25 nm, 5 to 25 nm, 10 to 25 nm, 2.5 to 20 nm, 5 to 20 nm, and 10 to 20 nm. Preferably, each substrate platelet has a thickness that is as uniform as possible. Due to the low thickness of the substrate platelets, the pigment exhibits particularly high hiding power. The substrate platelets preferably have a monolithic structure. Monolithic in this context means consisting of a single closed unit without fractures, stratifications or inclusions, although structural changes may occur within the substrate platelets. The substrate platelets are preferably homogeneously structured, i.e. there is no concentration gradient within the platelets. In particular, the substrate platelets do not have a layered structure and do not have any particles or particles distributed in them. The size of the substrate platelet can be adjusted to the respective application purpose, especially the desired effect on the keratinic material. Typically, the substrate platelets have an average largest diameter of about 2 to 200pm, especially about 5 to 100pm. In a preferred design, the aspect ratio, expressed by the ratio of the average size to the average thickness, is at least 80, preferably at least 200, more preferably at least 500, more preferably more than 750. The average size of the uncoated substrate platelets is the d50 value of the uncoated substrate platelets. Unless otherwise stated, the d50 value was determined using a Sympatec Helos device with quixel wet dispersion. To prepare the sample, the sample to be analysed was pre-dispersed in isopropanol for 3 minutes. The substrate platelets can be composed of any material that can be formed into platelet shape. They can be of natural origin, but also synthetically produced. Materials from which the substrate platelets can be constructed include metals and metal alloys, metal oxides, preferably aluminum oxide, inorganic compounds and minerals such as mica and (semi-)precious stones, and plastics. Preferably, the substrate platelets are constructed of metal (alloy). Any metal suitable for metallic glossy pigments can be used. Such metals include iron and steel, as well as all air and water resistant (semi)metals such as platinum, zinc, chromium, molybdenum and silicon, and their alloys such as aluminum bronzes and brass. Preferred metals are aluminum, copper, silver and gold. Preferred substrate platelets include aluminum platelets and brass platelets, with aluminum substrate platelets being particularly preferred. Lamellar substrate platelets are characterized by an irregularly structured edge and are also referred to as “cornflakes” due to their appearance. Due to their irregular structure, pigments based on lamellar substrate platelets generate a high proportion of scattered light. In addition, pigments based on lamellar substrate platelets do not completely cover the existing color of a keratinous material, and effects analogous to natural graying can be achieved, for example. Lenticular (= lens-shaped) substrate platelets have an essentially regular round edge and are also called “silver dollars” due to their appearance. Due to their regular structure, the proportion of reflected light predominates in pigments based on lenticular substrate platelets. Vacuum metallized pigments (VMP) can be obtained, for example, by releasing metals, metal alloys or metal oxides from suitably coated films. They are characterized by a particularly low thickness of the substrate platelets in the range of 5 to 50 nm and a particularly smooth surface with increased reflectivity. Substrate platelets comprising a vacuum-metallized pigment are also referred to as VMP substrate platelets in this application. VMP substrate platelets of aluminum can be obtained, for example, by releasing aluminum from metallized films. The metal or metal alloy substrate plates can be passivated, for example by anodizing (oxide layer) or chromating. Uncoated lamellar, lenticular, and / or VPM substrate plates, especially those made of metal or metal alloy, reflect incident light to a high degree and produce a light-dark flop. These have proven to be particularly suitable for use in colorants. Suitable pigments based on a lamellar substrate platelet include, for example, the pigments of the VISIONAIRE series from Eckart. Pigments based on a lenticular substrate platelet are available, for example, under the name Alegrace® Gorgeous from the company Schlenk Metallic Pigments GmbH. Pigments based on a substrate platelet comprising a vacuum metallized pigment are available, for example, under the name Alegrace® Marvelous or Alegrace® Aurous from the company Schlenk Metallic Pigments GmbH. The colorant (F) may also contain at least one direct-drawing dye as coloring compound(s). Directdrawing dyes are dyes that draw directly onto the hair and do not require an oxidative process to form the color. Direct-drawing dyes are usually nitrophenylene diamines, nitroaminophenols, azo dyes, anthraquinones, triarylmethane dyes or indophenols. The direct-drawing dyes within the meaning of the present invention have a solubility in water (760mmHg) at 25°C of more than 0.5g / L and are therefore not to be regarded as pigments. Preferably, the direct-drawing dyes within the meaning of the present invention have a solubility in water (760mmHg) at 25°C of more than 1 .Og / L. Direct-drawing dyes can be divided into anionic, cationic and non-ionic direct-drawing dyes. In the context of a further preferred embodiment, a method according to the invention is characterized in that the colorant (F) contains at least one coloring compound from the group consisting of cationic, nonionic, and anionic direct-drawing dyes. Cationic direct-drawing dyes are, for example Basic Blue 7, Basic Blue 26, HC Blue 16, Basic Violet 2 and Basic Violet 14, Basic Yellow 57, Basic Red 76, Basic Blue 16, Basic Blue 347 (Cationic Blue 347 / Dystar), HC Blue No. 16, Basic Blue 99, Basic Brown 16, Basic Brown 17, Basic Yellow 57, Basic Yellow 87, Basic Orange 31, Basic Red 51 Basic Red 76. Examples of nonionic direct dyes include nonionic nitro and quinone dyes and neutral azo dyes. Examples of nonionic direct dyes are those listed under the international designations or trade names HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 12, HC Orange 1, Disperse Orange 3, HC Red 1, HC Red 3, HC Red 10, HC Red 11, HC Red 13, HC Red BN, HC Blue 2, HC Blue 11, HC Blue 12, Disperse Blue 3, HC Violet 1, Disperse Violet 1, Disperse Violet 4, Disperse Black 9, as well as 1,4-diamino-2-nitrobenzene, 2-amino-4-nitrophenol, 1,4-bis-(2-hydroxyethyl)-amino-2-nitrobenzene, 3-nitro-4-(2-hydroxyethyl)-aminophenol, 2-(2-hydroxyethyl)amino-4,6-dinitrophenol, 4-[(2-hydroxyethyl)amino]-3-nitro-1-methylbenzene, 1-amino-4-(2-hydroxyethyl)-amino-5-chloro-2-nitrobenzene, 4-amino-3-nitrophenol, 1-(2-ureidoethyl)amino-4-nitrobenzene, 2-[(4-amino-2-nitrophenyl)amino]-benzoic acid, 6-nitro-1,2,3,4-tetrahydroquinoxaline, 2-hydroxy-1,4-naphthoquinone, picramic acid and its salts, 2-amino-6-chloro-4-nitrophenol, 4-ethylamino-3-nitrobenzoic acid, and 2-chloro-6-ethylamino-4-nitrophenol. Anionic direct-drawing dyes are also called acid dyes. Acid dyes are direct-drawing dyes that have at least one carboxylic acid group (-COOH) and / or one sulphonic acid group (-SO3H). Depending on the pH value, the protonated forms (-COOH, -SO3H) of the carboxylic acid or sulphonic acid groups are in equilibrium with their deprotonated forms (-OO; -SO3- present). The proportion of protonated forms increases with decreasing pH. If direct-drawing dyes are used in the form of their salts, the carboxylic acid groups or sulphonic acid groups are present in deprotonated form and are neutralized with corresponding stoichiometric equivalents of cations to maintain electro neutrality. Inventive acid dyes can also be used in the form of their sodium salts and / or their potassium salts. The acid dyes within the meaning of the present invention have a solubility in water (760 mmHg) at 25°C of more than 0.5g / L and are therefore not to be regarded as pigments. Preferably the acid dyes within the meaning of the present invention have a solubility in water (760mmHg) at 25°C of more than 1 .Og / L. The alkaline earth salts (such as calcium salts and magnesium salts) or aluminum salts of acid dyes often have a lower solubility than the corresponding alkali salts. If the solubility of these salts in water is below 0.5g / L, preferably less than 0.1 g / L, even more preferably less than 0.05g / L (in each case at 25°C, 760mmHg), they do not fall under the definition of a direct-drawing dye. An essential characteristic of acid dyes is their ability to form anionic charges, whereby the carboxylic acid or sulphonic acid groups responsible for this are usually linked to different chromophoric systems. Suitable chromophoric systems can be found, for example, in the structures of nitrophenylene diamines, nitroaminophenols, azo dyes, anthraquinone dyes, triarylmethane dyes, xanthene dyes, rhodamine dyes, oxazine dyes and / or indophenol dyes. Examples of acid dyes include Acid Yellow 1 (D&C Yellow 7, Citronin A, Ext. D&C Yellow No. 7, Japan Yellow 403,Cl 10316, COLIPA n° B001), Acid Yellow 3 (COLIPA n°: C 54, D&C Yellow N° 10, Quinoline Yellow, E104, Food Yellow 13), Acid Yellow 9 (Cl 13015), Acid Yellow 17 (Cl 18965), Acid Yellow 23 (COLIPA n° C 29, Covacap Jaune W 1100 (LCW), Sicovit Tartrazine 85 E 102 (BASF), Tartrazine, Food Yellow 4, Japan Yellow 4, FD&C Yellow No. 5), Acid Yellow 36 (Cl 13065), Acid Yellow 121 (Cl 18690), Acid Orange 6 (Cl 14270), Acid Orange 7 (2-Naphthol orange, Orange II, Cl 15510, D&C Orange 4, COLIPA n° C015), Acid Orange 10 (C.l. 16230; Orangeg sodium salt), Acid Orange 11 (Cl 45370), Acid Orange 15 (Cl 50120), Acid Orange 20 (Cl 14600), Acid Orange 24 (BROWN 1;CI20170;KATSU201;nosodiumsalt;Brown No.201;RESORCIN BROWN;ACID ORANGE 24;Japan Brown 201;D &C Brown No.1), Acid Red 14 (C.l.14720), Acid Red 18 (E124, Red 18; Cl 16255), Acid Red 27 (E 123, Cl 16185, C-Rot 46, Echtrot D, FD&C Red Nr.2, Food Red 9, Naphtholrot S), Acid Red 33 (Red 33, Fuchsia Red, D&C Red 33, Cl 17200), Acid Red 35 (Cl C.l. 18065), Acid Red 51 (Cl 45430, Pyrosin B, Tetraiodfluorescein, Eosin J, lodeosin), Acid Red 52 (Cl 45100, Food Red 106, Solar Rhodamine B, Acid Rhodamine B, Red n° 106 Pontacyl Brilliant Pink), Acid Red 73 (Cl 27290), Acid Red 87 (Eosin, Cl 45380), Acid Red 92 (COLIPA n° C53, Cl 45410), Acid Red 95 (Cl 45425, Erythtosine, Simacid Erythrosine Y), Acid Red 184 (Cl 15685), Acid Red 195, Acid Violet 43 (Jarocol Violet 43, Ext. D&C Violet n° 2, C.l. 60730, COLIPA n° C063), Acid Violet 49 (Cl 42640), Acid Violet 50 (Cl 50325), Acid Blue 1 (Patent Blue, Cl 42045), Acid Blue 3 (Patent Blau V, Cl 42051), Acid Blue 7 (Cl 42080), Acid Blue 104 (Cl 42735), Acid Blue 9 (E 133, Patentblau AE, Amidoblau AE, Erioglaucin A, Cl 42090, C.l. Food Blue 2), Acid Blue 62 (Cl 62045), Acid Blue 74 (E 132, Cl 73015), Acid Blue 80 (Cl 61585), Acid Green 3 (Cl 42085, Foodgreenl), Acid Green 5 (Cl 42095), Acid Green 9 (C.l.42100), Acid Green 22 (C.l.42170), Acid Green 25 (Cl 61570, Japan Green 201, D&C Green No. 5), Acid Green 50 (Brilliant Acid Green BS, C.l. 44090, Acid Brilliant Green BS, E 142), Acid Black 1 (Black n° 401, Naphthalene Black 10B, Amido Black 10B, Cl 20 470, COLIPA n° B15), Acid Black 52 (Cl 15711), Food Yellow 8 (Cl 14270), Food Blue 5, D&C Yellow 8, D&C Green 5, D&C Orange 10, D&C Orange 11, D&C Red 21, D&C Red 27, D&C Red 33, D&C Violet 2 and / or D&C Brown 1. The coloring compounds (F1) are preferably used in certain quantity ranges in the composition according to the invention. Particularly good results are obtained when the colorant (F) contains one or more coloring compounds (F-1) in an amount of 0.01 to 20.0% by weight, preferably from 0.1 to 10.0% by weight, more preferably from 0.2 to 5.0% by weight, and most preferably from 0.3 to 2.5% by weight. In a further particularly preferred embodiment, a method according to the invention is characterized in that the colorant (F) - based on the total weight of the colorant (F) - contains one or more coloring compounds (F1) in a total amount of 0.01 to 20.0% by weight, preferably 0.1 to 10.0% by weight%, more preferably 0.2 to 5.0% by weight and most preferably 0.3 to 2.5% by weight. In a further particularly preferred embodiment, a method according to the invention is characterized in that the colorant (F), based on the total weight of the colorant (F), contains one or more pigments (F1) in a total amount of 0.01 to 20.0% by weight, preferably 0.1 to 10.0% by weight, more preferably 0.2 to 5.0% by weight, and most preferably 0.3 to 2.5% by weight. In a further particularly preferred embodiment, a method according to the invention is characterized in that the colorant (F), based on the total weight of the colorant (F), contains one or more direct dyes (F1) in a total amount of 0.01 to 20.0% by weight, preferably 0.1 to 10.0% by weight, more preferably 0.2 to 5.0% by weight and particularly preferably 0.3 to 2.5% by weight. Organic Ci-Ce-alkoxy silanes in the colorant (F) and / or in the post-treatment agent (N) The coloring compound(s) are deposited on the surface of the keratin fibers and are immobilized there by a film formed from the organic Ci-Ce-alkoxy silanes and / or their hydrolysis and / or condensation products. If the organic Ci-Ce-alkoxy silanes are contained in the colorant (F) together with the coloring compounds, the deposition of the coloring compounds and the film formation resulting from the condensation of the silanes take place simultaneously. In this case, the coloring compounds are evenly incorporated into the film. In a further embodiment, the organic Ci-Ce-alkoxy silanes can also be used in the post-treatment agent (N). Since the post-treatment agent (N) is applied after the colorant (F), in this case the coloring compounds are first deposited on the keratin surface, and the silane film then forms on the coloring compounds and fixes them in this way. The process according to the invention is therefore characterized in that at least one of the agents (F) and / or (N) contains at least one organic Ci-Ce-alkoxy silane and / or its hydrolysis and / or condensation products. If the organic Ci-Ce-alkoxy silanes are contained in the colorant, then the application of the posttreatment agent (N) is optional. However, if there are no organic Ci-Cealkoxy silanes in the colorant (F), then the post-treatment agent (N) must be used to enable the immobilization of the coloring compounds by the organic Ci-Cealkoxy silanes. In a further particularly preferred embodiment, a method according to the invention is characterized in that it either - optionally comprising a step (3) in which a post-treatment agent (N) is applied to the keratinous fibers, and that the organic Ci-Ce-alkoxy silanes and / or their hydrolysis and / or condensation products are contained in the colorant (F), or that it - necessarily comprises a step (3) in which the post-treatment agent (N) is applied to the keratinous fibers, and that the organic Ci-Ce-alkoxy silanes and / or their hydrolysis and / or condensation products are contained in the post-treatment agent (N). An optionally applicable post-treatment agent (N) that does not contain organic Ci-Ce-alkoxy silanes can be, for example, a conventional conditioner that contains at least one conditioning substance. Caring substances in this context are, for example, cationic polymers and / or cationic surfactants. In a further embodiment, however, the organic Ci-Ce-alkoxy silanes may also be present in both the colorant (F) and the post-treatment agent (N). In this case, the coloring compounds are first fixed by the film formation that takes place at the same time as the dyes are deposited, and then a second film without dyes is produced over the first colored film by applying the post-treatment agent. In a further particularly preferred embodiment, a method according to the invention is characterized in that - both the colorant (F) and the post-treatment agent (N) contain at least one organic Ci-Ce-alkoxy silane and / or its hydrolysis and / or condensation products, and - in that the method comprises a step (3) in which the post-treatment agent (N) is applied to the keratinous fibers. The organic Ci-Ce-alkoxy silanes contained in agents (F) and / or (N) are reactive compounds. If they are contained in the colorant (F), they can also be referred to as component (F-2). If they are contained in the after-treatment agent (N), they can also be referred to as component (N-1). Organic silicon compounds, alternatively called organosilicon compounds, are compounds which either have a direct silicon-carbon bond (Si-C) or in which the carbon is bonded to the silicon atom via an oxygen, nitrogen or sulfur atom. The organic silicon compounds of the invention are compounds containing one to three silicon atoms. Organic silicon compounds preferably contain one or two silicon atoms. According to IUPAC rules, the term silane stands for a group of chemical compounds based on a silicon skeleton and hydrogen . In organic silanes, the hydrogen atoms are completely or partially replaced by organic groups such as (substituted) alkyl groups and / or alkoxy groups. In organic silanes, some of the hydrogen atoms may also be replaced by hydroxy groups. In an organic Ci-Ce alkoxysilane, at least one Ci-Ce alkoxy group is directly bonded to the silicon atom. The C1-C6 alkoxy group(s) is / are in particular an ethoxy group or a methoxy group. For example, if the hydrolyzable group is an ethoxy group, the organic silicon compound preferably contains a structural unit R’R“R“‘Si-O-CH2-CH3. The radicals R', R", and R’" represent the three remaining free valences of the silicon atom. Particularly stable films can be produced with Ci-Ce-alkoxy silanes of formula (I) and / or their hydrolysis and / or condensation products, RiR2N-L-Si(OR3)a(R4)b (I), where Ri, R2 independently represent a hydrogen atom or a Ci-Ce alkyl group, L is a linear or branched divalent C1-C20 alkylene group, Ri, R4 independently of one another represent a Ci-Ce alkyl group, a, stands for an integer from 1 to 3, and b stands for the integer 3 - a. In a further particularly preferred embodiment, the process is characterized in that the colorant (F) and / or the post-treatment agent (N) contains at least one Ci-Ce-alkoxy silane of the formula (I) and / or its hydrolysis and / or condensation products RiR2N-L-Si(OR3)a(R4)b (I), where Ri, R2 independently represent a hydrogen atom or a Ci-Ce alkyl group, L is a linear or branched divalent C1-C20 alkylene group, Ri, R4 independently of one another represent a Ci-Ce alkyl group, a, stands for an integer from 1 to 3, and b stands for the integer 3 - a. The substituents Ri, R2, R3, R4, and L in the compounds of formula (I) are explained below byway of example: Examples of a Ci-Ce alkyl group are the groups methyl, ethyl, propyl, isopropyl, n-butyl, s-butyl and t-butyl, n-pentyl and n-hexyl. Propyl, ethyl and methyl are preferred alkyl radicals. Examples of a C2-C6 alkenyl group are vinyl, allyl, but-2-enyl, but-3-enyl and isobutenyl, preferred C2-C6 alkenyl radicals are vinyl and allyl. Examples of a linear divalent C1-C20 alkylene group are, for example, the methylene group (-CH2-), the ethylene group (-CH2-CH2-), the propylene group (-CH2-CH2-CH2-) and the butylene group (-CH2-CH2-CH2-CH2-). The propylene group (-CH2-CH2-CH2-) is particularly preferred. From a chain length of 3 C atoms, divalent alkylene groups can also be branched. Examples of branched, divalent C3-C2o alkylene groups are (-CH2-CH(CH3)-) and(-CH2-CH(CH3)-CH2-). In the organic silicon compounds of the formula (I) RiR2N-L-Si(OR3)a(R4)b (I), the radicals Ri and R2 independently of one another represent a hydrogen atom or a Ci-Ce alkyl group. Particularly preferred are the radicals Ri and R2, both of which represent a hydrogen atom . In the middle part of the organic silicon compound is the structural unit or the linker -L- which stands for a linear or branched, divalent Ci-C2o alkylene group. A divalent Ci-C2o alkylene group may alternatively be referred to as a divalent or divalent Ci-C2o alkylene group, by which is meant that each L grouping may form two bonds. One bond is from the amino group RiR2N to the linker L, and the second bond is between the linker L and the silicon atom. Preferably, -L- represents a linear, divalent (i.e., divalent) Ci-C2o alkylene group. Further preferably -L- stands for a linear bivalent Ci-Ce alkylene group. Particularly preferred -L stands for a methylene group (CH2-), an ethylene group (-CH2-CH2-), propylene group (-CH2-CH2-CH2-) or butylene (-CH2-CH2-CH2-CH2-). In particular, L stands fora propylene group (-CH2-CH2-CH2-) The linear propylene group (-CH2-CH2-CH2-) can alternatively be referred to as the propane-1,3-diyl group. The organic silicon compounds of formula (I) RiR2N-L-Si(OR3)a(R4)b (I), one end of each carries the silicon-containing group -Si(OR3)a(R4)b In the terminal structural unit -Si(OR3)a(R4)b, R3 is hydrogen or Ci-Ce alkyl group, and R4 is Ci-Ce alkyl group. Particularly preferred are R3 and R4 independently representing a methyl group or an ethyl group . Here a stands for an integer from 1 to 3, and b stands for the integer 3 - a. If a stands for the number 3, then b is equal to 0. If a stands for the number 2, then b is equal to 1. If a stands for the number 1, then b is equal to 2. Particularly resistant films could be produced when the colorant (F) and / or the after-treatment agent (N) contained at least one organic silicon compound (a1) of formula (I), in which the radicals R3 and R4 independently of one another represent a methyl group or an ethyl group. When using the method for dyeing keratinous material, dyes with the best wash fastness were obtained when the colorant (F) and / or the post-treatment agent (N) contained at least one organic silicon compound of formula (I), in which the radicals R3 and R4 independently of one another represent a methyl group or an ethyl group. Furthermore, dyes with the best wash fastness could be obtained when the agent (F) and / or (N) contained at least one organic silicon compound of formula (I), in which radical a represents the number 3. In this case, radical b represents the number 0. In a further preferred embodiment, the colorant (F) and / or the post-treatment agent (N) used in the process is characterized in that it contains at least one organic silicon compound of formula (I), wherein - R3, R4 independently of one another represent a methyl group or an ethyl group and - a stands for the number 3 and - b stands for the number 0. In a further preferred embodiment, a process is characterized in that a dyeing agent (F) and / or post-treatment agent (N) is applied to the keratinous fibers, which comprises at least one organic Ci-Ce-alkoxysilane of formula (I), RiR2N-L-Si(OR3)a(R4)b (I), where - Ri, R2 both represent a hydrogen atom, and - L stands for a linear, divalent Ci-Ce alkylene group, preferably for a propylene group (-CH2-CH2-CH2-) or for an ethylene group (-CH2-CH2-), - R3 represents a hydrogen atom, an ethyl group or a methyl group, - R4 represents a methyl group or an ethyl group, - a stands for the number 3 and - b stands for the integer 0, and / or its hydrolysis and / or condensation products. Organic silicon compounds of the formula (I) which are particularly suitable for solving the problem according to the invention are - (3-Aminopropyl)triethoxysilane - (3-Aminopropyl)trimethoxysilane - 1-(3-Aminopropyl)silantriol - (2-Aminoethyl)triethoxysilane - (2-Aminoethyl)trimethoxysilane 1 -(2-Aminoethyl)silantriol - (3-Dimethylaminopropyl)triethoxysilane - (3-Dimethylaminopropyl)trimethoxysilane 1-(3-Dimethylaminopropyl)silantriol - (2-Dimethylaminoethyl)triethoxysilane. 1-(2-Dimethylaminoethyl)silantriol In a further preferred embodiment, a method is characterized in that the colorant (F) and / or aftertreatment agent (N) contains at least one organic Ci-Ce alkoxysilane selected from the group consisting of - (3-Aminopropyl)triethoxysilane - (3-Aminopropyl)trimethoxysilane - 1-(3-Aminopropyl)silantriol - (2-Aminoethyl)triethoxysilane - (2-Aminoethyl)trimethoxysilane - 1-(2-Aminoethyl)silantriol - (3-Dimethylaminopropyl)triethoxysilane - (3-Dimethylaminopropyl)trimethoxysilane - 1-(3-Dimethylaminopropyl)silantriol - (2-Dimethylaminoethyl)triethoxysilane - (2-Dimethylaminoethyl)trimethoxysilane - 1-(2-Dimethylaminoethyl)silantriol and / or the hydrolysis and / or condensation products of the aforementioned compounds. The aforementioned organic silicon compounds of formula (I) are commercially available. (3-aminopropyl)trimethoxysilane, for example, can be purchased from Sigma-Aldrich. Also (3-aminopropyl)triethoxysilane is commercially available from Sigma-Aldrich. In further tests, particularly dyeing tests, it has also proven to be particularly advantageous to apply an organic Ci-Ce alkoxysilane of formula (II) to the keratinous fibers in the process, R5Si(OR6)k(R7)m (II), where - Rs stands for a C1-C18 alkyl group, - Re represents a hydrogen atom or a Ci-Ce alkyl group, - R7 represents a Ci-Ce alkyl group - k is an integer from 1 to 3, and - m stands for the integer 3 - k. The organic silicon compound(s) of formula (II) can also be referred to as alkyl-alkoxy-silanes . If R6 stands for a hydrogen atom, the group bonded directly to the silicon atom is an OH group. If k is three and the radical R6 in all three units represents a hydrogen atom, the silane is an alkyltrihydroxysilane, which can alternatively be referred to as an alkyIsilane-triol. Alkylsilane triols are the complete hydrolysis products of the corresponding alkoxysilanes. Preferred are organic Ci-Ce-alkoxysilanes of formula (II) R5Si(OR6)k(R7)m (II), where - Rs stands for a C1-C18 alkyl group, - Re stands for a Ci-Ce alkyl group, - R7 represents a Ci-Ce alkyl group - k is an integer from 1 to 3, and - m stands fort he integer 3 - k, and / or their hydrolysis and / or condensation products. In a further particularly preferred embodiment, a process according to the invention is characterized in that the colorant (F) and / or the post-treatment agent (N) comprises at least one Ci-Ce-alkoxy silane of the formula (II) and / or its hydrolysis and / or condensation products R5Si(OR6)k(R7)m (II), where - Rs stands for a C1-C18 alkyl group, - Re stands for a Ci-Ce alkyl group, - R7 represents a Ci-Ce alkyl group - k is an integer from 1 to 3, and - m stands for the integer 3 - k. In a further particularly preferred embodiment, a method according to the invention is characterized in that the colorant (F) contains at least one Ci-Ce-alkoxy silane of formula (II) and / or its hydrolysis and / or condensation products R5Si(ORe)k(R7)m (II), where - Rs stands for a C1-C18 alkyl group, - Re stands for an Ci-Ce alkyl group, - R7 represents a Ci-Ce alkyl group - k is an integer from 1 to 3, and - m stands for the integer 3 - k. In a further particularly preferred embodiment, a method according to the invention is characterized in that the post-treatment agent (N) contains at least one C1-C6 alkoxy silane of formula (II) and / or its hydrolysis and / or condensation products R5Si(OR6)k(R7)m (II), where - Rs stands for a C1-C18 alkyl group, - Re stands for a Ci-Ce alkyl group, - R7 represents a Ci-Ce alkyl group - k is an integer from 1 to 3, and - m stands for the integer 3 - k. In the organic silicon compounds of formula (II), the radical Rs represents a C1-C18 alkyl group. This C1-C18 alkyl group is saturated and can be linear or branched. Preferably, Rg represents a linear C1-C18 alkyl group. Preferably, Rs represents a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group, an n-octyl group, an n-dodecyl group or an n-octyldecyl group. Particularly preferably, Rg represents a methyl group, an ethyl group, an n-hexyl group or an n-octyl group. In the organic silicon compounds of form (II), the Re radical represents a hydrogen atom or a Ci-Ce alkyl group. Especially preferably, Re stands for a methyl group or an ethyl group. In the organic silicon compounds of form (IV), the radical R7 represents a Ci-Ce alkyl group. Particularly preferably, R7 represents a methyl group or an ethyl group. Furthermore, k stands for a whole number from 1 to 3, and m stands for the whole number 3 - k. If k stands for the number 3, then m is equal to 0. If k stands for the number 2, then m is equal to 1. If k stands for the number 1, then m is equal to 2. Particularly stable films, i.e., dyes with particularly good wash fastness, could be obtained when a colorant (F) and / or a post-treatment agent containing at least one organic Ci-Ce alkoxysilane of formula (II) was used in the method, in which the radical k stands for the number 3. In this case, the radical m stands for the number 0. Organic silicon compounds of the formula (II) which are particularly suitable for solving the problem according to the invention are - Methyltrimethoxysilane - Methyltriethoxysilane - Ethyltrimethoxysilane - Ethyltriethoxysilane - n-Hexyltrimethoxysilane - n-Hexyltriethoxysilane - n-Octyltrimethoxysilane - n-dodecyltrimethoxysilane and / or - n-dodecyltriethoxysilane. In a further preferred embodiment, a method is characterized in that the colorant (F) and / or the post-treatment agent (N) contains at least one organic silicon compound of formula (II), which is selected from the group consisting of - Methyltrimethoxysilane - Methyltriethoxysilane - Ethyltrimethoxysilane - Ethyltriethoxysilane - Propyltrimethoxysilane - Propyltriethoxysilane - Hexyltrimethoxysilane - Hexyltriethoxysilane - Octyltrimethoxysilane - Octyltriethoxysilane - Dodecyltrimethoxysilane - Dodecyltriethoxysilan - Octadecyltrimethoxysilane and / or - Octadecyltriethoxysilane. Furthermore, particularly robust films were obtained when a combination of organic Ci-Ce-alkoxysilanes of formulae (I) and (II) or the particularly preferred representatives of these groups were used in the colorant (F) and / or in the post-treatment agent (N). In a further particularly preferred embodiment, a method according to the invention is characterized in that the colorant (F) and / or the aftertreatment agent (N) contains - at least one first Ci-Ce-alkoxy-silane selected from the group consisting of (3-aminopropyl)trimethoxysilane, (3-aminopropyl)-triethoxysilane, (2-aminoethyl)trimethoxy-silane, (2-aminoethyl)triethoxysilane, (3-dimethyl-aminopropyl)-trimethoxysilane, (3-dimethylamino-propyl)triethoxysilane, (2-dimethylamino-ethyl)trimethoxy-silane, (2-dimethylaminoethyl)-triethoxy-silane and / or their hydrolysis and / or condensation products, and - at least a second Ci-Ce-alkoxy-silane selected from the group consisting of methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxy-silane, hexyltrimethoxysilane, hexyltriethoxysilane, octyltrimethoxysilane, octyltriethoxysilane, dodecyltrimethoxysilane, dodecyltriethoxysilane and / or their hydrolysis and / or condensation products. In this context, it has proven to be preferable if the colorant (F) - based on the total weight of the colorant (F) - contains one or more organic Ci-Ce alkoxysilanes in a total amount of 0.1 to 20% by weight, preferably 1 to 15% by weight and particularly preferably 2 to 8% by weight. In this context, it has been found to be preferable for the post-treatment agent (N) - based on the total weight of the post-treatment agent (N) - contains one or more organic Ci-Ce alkoxysilanes in a total amount of 0.1 to 20% by weight, preferably 1 to 15% by weight and particularly preferably 2 to 8% by weight. Hydrolysis and / or condensation products of organic Ci-Ce-alkoxysilanes Even the addition of small amounts of water leads to hydrolysis in the case of organic Ci-Ce-alkoxysilanes with at least one hydrolyzable group (this is the respective alkoxy group). The hydrolysis products and / or organic silicon compounds with at least one hydroxyl group can react with each other in a condensation reaction. For this reason, both the organic Ci-Ce alkoxysilanes with at least one hydrolyzable group and their hydrolysis and / or condensation products can be contained in the respective agent. When using silanes with at least one hydroxyl group, both the organic silicon compounds with at least one hydroxyl group and silanes with several hydroxyl groups as well as their condensation products can be contained in the agent. A condensation product is understood to be a product formed by the reaction of at least two organic silicon compounds, each with at least one hydroxyl group or hydrolyzable group per molecule, with the elimination of water and / or the elimination of an alkanol. The condensation products can be dimers, for example, but also trimers or oligomers, whereby the condensation products are in equilibrium with the monomers. Depending on the amount of water used or consumed in the hydrolysis, the equilibrium shifts from monomeric organic silicon compounds to condensation product. Particularly good results were obtained when organic Ci-Ce alkoxysilanes of formula (I) and / or (II) were used in this method. As described above, hydrolysis / condensation begins even with traces of moisture, so the hydrolysis and / or condensation products of the organic alkoxysilanes (I) and / or (II) are also comprised in this embodiment. The organic Ci-Ce-alkoxy silanes, in particular those of formula (I) and / or (II), are reactive compounds that can undergo a hydrolysis and condensation reaction with water. The reaction of the organic Ci-Ce alkoxy silanes with water can take place in different ways. The reaction starts as soon as the Ci-Ce alkoxy silanes come into contact with water by mixing. As soon as Ci-Ce alkoxy silanes and water come into contact, an exothermic hydrolysis reaction takes place according to the following scheme (reaction scheme using the example of 3-aminopropyltriethoxysilane): OEt H2N I Si—OEt I + H2O OEt + EtOH Depending on the number of hydrolyzable Ci-Ce alkoxy groups per silane molecule, the hydrolysis reaction can also occur several times per Ci-Ce alkoxy silane used: OH I Si—OH + 3 EtOH OH H2N^^^S|-OEt + 2 H2O ----► H2NX^X\^ / Si—OH + 2 EtOH OEt OEt or OEt I H2N^^^S,-OEt + 3 H2O ----► H2N OEt Hydrolysis using the example of methyltrimethoxysilane: OMe OMe I                                                                                                                                                                                             | CH3—Si—OMe + H2O -----► CH 3—Si—OH + MeOH I                                                                                                                                                                                             I OMe OMe Depending on the amount of water used, the hydrolysis reaction can also take place several times per Ci-Ce alkoxy silane used: OMe I CH3—Si—OMe + 2 H2O OMe OH I CH3—Si—OH + 2 MeOH OMe or OMe | OH I CH3—S|—OMe + 3 H2O ---- I -► CH3—Si—OH + 3 MeOH I OMe I OH Following the hydrolysis or virtually simultaneously with the hydrolysis, condensation of the partially (or in some cases completely) hydrolyzed Ci-Ce-alkoxy silanes takes place. Pre-condensation can take place, for example, according to the following scheme: nh2 nh2 oh oh H3c—Si—OMe + H3C—Si—OMe ► Me0 0 OMe + MeOH I I II OMe OMe CHs CH3 Both partially hydrolyzed and fully hydrolyzed Ci-Ce alkoxysilanes can participate in the condensation reaction, undergoing condensation with not yet reacted, partially or also fully hydrolyzed C1-C6 alkoxysilanes. Possible condensation reactions include (shown using the mixture (3-aminopropyl)triethoxysilane and methyltrimethoxysilane): OEt OEt H2N^^^^^^Si—OH + OEt OEt OEt and / or H2N OEt Si—OH OEt OEt + OH OEt and / or OEt OEt H2N Si—OH + H2N Si—OH OEt OEt OEt OH OEt—Si—O—Si—OEt EtOH NH2 NH2 and / or OEt OMe OEt OMe H2N •Si—OH --Si—OMe OEt—Si—O—Si—OMe OEt OMe MeOH NH2 and / or OEt OMe OEt OMe h2n .Si—OH --Si—OH OEt—Si—O—Si—OMe OEt OMe H2O NH2 and / or OEt OMe OH OMe h2n Si—OH --Si—OH EtO—Si—O—Si—OMe OEt OMe NH2 EtOH and / or OMe OMe OMe OMe —Si—OH --Si—OMe MeO—Si—O—Si—OMe MeOH OMe OMe In the above exemplary reaction schemes the condensation to a dimer is shown in each case, but further condensations to oligomers with several silane atoms are also possible and also preferred. This hydrolysis or condensation reaction already starts in the presence of very small amounts of water, therefore the oligomers and / or condensation products of the aforementioned organic silicon compounds are also covered by the present invention. Condensation products of organic Ci-Ce-alkoxysilanes are understood in the sense of the application to be condensates formed by reaction of the organic Ci-Ce-alkoxysilanes with one another. Cosmetic carrier of the colorant (F) or after-treatment agent (N) The colorant (F) preferably contains the coloring compounds in a cosmetic carrier. If the colorant (F) additionally also contains the organic Ci-Ce-alkoxysilanes, this cosmetic carrier is particularly preferably low in water. If a post-treatment agent (N) is applied to the keratinous fibers and this contains the organic Ci-Cealkoxysilanes, the cosmetic carrier of the post-treatment agent is also particularly preferably low in water. The low water content in the agent (F) and / or (N) ensures the storage stability of the respective agent and also ensures that the organic Ci-Ce-alkoxysilanes are still present in reactive form and are not yet fully polymerized. If the complete crosslinking of the organic Ci-Cealkoxysilanes only takes place after the agent (F) or (N) has been applied to the keratin fibers, the film formed during crosslinking is characterized by particularly high robustness and resistance. Robust films are already obtained if the respective agent (F) or (N) contains less than 25.0% water by weight. It has proven to be preferable if the water content in the medium (F) and / or (N) is reduced even further. It is particularly preferred that the colorant (F) is formulated to be so low in water that the water content of the colorant (F) - relative to the total weight of the colorant (F) - is in the range of 0 to 20.0% by weight, preferably 0.1 to 10.0% by weight, more preferably 0.1 to 5.0% by weight, and particularly preferably 0.5 to 3.0% by weight water. In a further particularly preferred embodiment, a method according to the invention is characterized in that the colorant (F) - relative to the total weight of the colorant (F) - contains 0 to 20.0% by weight, preferably 0.1 to 10.0% by weight, more preferably 0.1 to 5.0% by weight, and particularly preferably 0.5 to 3.0% by weight water. It is particularly preferred that the after-treatment agent (N) is formulated to be so low in water that the water content of the after-treatment agent (N) - based on the total weight of the after-treatment agent (N) - is in the range of 0 to 20.0% by weight, preferably 0.1 to 10.0% by weight, more preferably 0.1 to 5.0% by weight, and particularly preferably 0.5 to 3.0% by weight water. In a further particularly preferred embodiment, a method according to the invention is characterized in that the after-treatment agent (N) - based on the total weight of the after-treatment agent (N) -contains 0 to 20.0% by weight, preferably 0.1 to 10.0% by weight, more preferably 0.1 to 5.0% by weight, and particularly preferably 0.5 to 3.0% by weight waterbevorzugt von 0,1 bis 5,0 Gew.-%, und besonders bevorzugt von 0,5 bis 3,0 Gew.-% Wasser enthalt. Compounds from the group of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol are particularly suitable as cosmetic carriers other than water, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate. Ethanol has proven to be particularly suitable for this purpose. Ethanol has the CAS number 64-17-5. Isopropanol has the CAS number 67-63-0. 1,2-Propylene glycol is also known as 1,2-propanediol and has the CAS numbers 57-55-6 [(RS)-1,2-dihydroxypropane], 4254-14-2 [(R)-1,2-dihydroxypropane], and 4254-153 [(S)-1,2-dihydroxypropane]. Ethylene glycol is alternatively known as 1,2-ethanediol and carries CAS number 107-21-1.Glycerol is alternatively known as 1,2,3-propanetriol and carries CAS number 56-81-5. Phenoxyethanol has the Cas number 122-99-6. Dipropylene glycols (or oxydipropanols) form a group of substances derived from glycol ether. The group of dipropylene glycols includes 2,2'-oxydi-1-propanol with the CAS no. 108-61-2, 1,1 '-oxydi-2-propanol with the CAS no. 110-98-5 and 2-(2-hydroxypropoxy)-1-propanol with the CAS no. 106-62-7. The mixture of these three isomers has the CAS number 25265-71-8. Diethylene glycol monoethyl ether can alternatively be called ethoxydiglycol or ethyldiglycol or 2-(2-ethoxyethoxy)ethanol) and has the CAS number 111-90-0. Benzyl alcohol can also be referred to as phenylmethanol and has the CAS No. 100-51-6. All of the solvents described previously are commercially available from various chemical suppliers, such as Aldrich or Fluka. Another suitable solvent is polyethylene glycols of the formula (EG) H—O—CH2 —CH2-0--H X (EC), where x stands for an integer from 2 to 10,000, preferably for an integer from 2 to 800, more preferably for an integer from 3 to 600, even more preferably for an integer from 3 to 400, and most preferably for an integer from 4 to 200. In another particularly preferred embodiment, a process according to the invention is therefore characterized in that the colorant (F) and / or the post-treatment agent (N) comprises one or more polyethylene glycols (a4) of the formula (EG), H—O—CH2 —CH2-0--H X (EG), where x stands for an integer from 2 to 10,000, preferably for an integer from 2 to 800, more preferably for an integer from 3 to 600, even more preferably for an integer from 3 to 400, and most preferably for an integer from 4 to 200. Depending on their chain length, polyethylene glycols are liquid or solid, water-soluble polymers. Polyethylene glycols with a molecular weight between 200g / mol and 400g / mol are non-volatile liquids at room temperature. PEG 600 has a melting range of 17 to 22°C and thus a paste-like consistency. With molecular masses above 3000 g / mol, PEGs are solid substances and are marketed as flakes or powder. In particular, the use of low molecular weight alkylene glycols (or polyethylene glycols) has proven to be well suited for solving the problem according to the invention. In the case of low molecular weight alkylene glycols (or polyethylene glycols) within the meaning of the present invention, x represents an integer from 1 to 100, preferably an integer from 1 to 80, more preferably an integer from 2 to 60, even more preferably an integer from 3 to 40, even more preferably an integer from 4 to 20, and most preferably an integer from 6 to 15. A particularly preferred low-molecular polyethylene glycol is, for example, PEG-8. PEG-8 contains an average of 8 ethylene glycol units (x1 = 8), has an average molecular weight of 400 g / mol and has the CAS number 25322-68-3. PEG-8 is alternatively known as PEG 400 and is commercially available from the company APS, for example. Other suitable low-molecular polyethylene glycols include PEG-6, PEG-7, PEG-9 and PEG-10. Another suitable polyethylene glycol is PEG-32, for example. PEG-32 comprises 32 ethylene glycol units (x 1 = 32), has an average molecular weight of 1500 g / mol and bears the CAS number 25322-68-3. PEG-32 is also known as PEG 1500 and can be purchased commercially from Clariant, for example. The solvent(s) other than water are preferably used in the colorant (F) in certain quantity ranges. Good results were obtained when the colorant (F) - based on the total weight of the colorant (F) -contained one or more solvents other than water in a total amount of 20 to 95% by weight, preferably 30 to 85% by weight, more preferably 40 to 80% by weight, and most preferably 45 to 75% by weight. The post-treatment agent (N) also contains solvents other than water, preferably in certain quantities. Good results were obtained when the curing agent (N) - relative to the total weight of the curing agent (N) - contained one or more solvents other than water in a total amount of 20 to 95% by weight, preferably 30 to 85% by weight, more preferably 40 to 80% by weight, and most preferably 45 to 75% by weight. In a further particularly preferred embodiment, a process according to the invention is characterized in that the colorant (F) and / or the post-treatment agent (N) - based on the total weight of the respective agent - contains one or more solvents from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate in a total amount of 20 to 95% by weight, preferably from 30 to 85% by weight, more preferably from 40 to 80% by weight and most preferably from 45 to 75% by weight. In a further explicitly preferred embodiment, a method according to the invention is characterized in that the colorant (F) - based on the total weight of the colorant (F) - contains 20 to 95% by weight, preferably 30 to 85% by weight, more preferably 40 to 80% by weight, and most preferably 45 to 75% by weight ethanol. In a further explicitly particularly preferred embodiment, a method according to the invention is characterized in that the post-treatment agent (N) - based on the total weight of the post-treatment agent (N) - contains 20 to 95% by weight, preferably 30 to 85% by weight, more preferably 40 to 80% by weight, and most preferably 45 to 75% by weight ethanol. Sequence of the process steps The method according to the invention is characterized by the application of a pre-treating agent (V) to the keratinous fibers in a first step. In the second step, the dye (F) is applied to the keratinous fibers. In this case, there is no washing step between steps (1) and (2), or in other words, there is no hair washing between steps (1) and (2), and the pre-treatment agent (V) is not rinsed out before the colorant (F) is applied. The keratin fibers are thus not rinsed with tap water (or with tap water and shampoo or surfactant) during the process, or in other words, there is no rinsing process and no hair washing between steps (1) and (2). Assuming that a user washes their hair on average at least every two days, the period within which steps (1) and (2) are carried out is limited in practice to a maximum of 48 hours. However, it has proven to be particularly preferable to limit this period even further to a maximum of 24 hours, further preferably to a maximum of 12 hours and particularly preferably to a maximum of 4 hours. If steps (1) and (2) are carried out within a maximum period of 4 hours, the user goes to the hairdresser once or carries out the coloring process once at home and obtains the desired color result at the end of the process after completing step (2). In the context of a further particularly preferred embodiment, the method according to the invention is characterized in that steps (1) and (2) are carried out within a period of no more than 48 hours, preferably no more than 24 hours, more preferably no more than 12 hours, even more preferably no more than 4 hours, and particularly preferably no more than 2 hours. The post-treatment agent (N) is preferably applied above all when the organic Ci-Ce-alkoxysilanes are applied after the colorant and are to form an uncolored film on the coloring compounds. If the post-treatment agent (N) is used, it is particularly preferable to use it within a limited period of time. Particularly good results were obtained if the post-treatment agent (N) was applied no more than 48 hours, preferably no more than 24 hours, more preferably no more than 12 hours and most preferably no more than 4 hours after application of the pre-treatment agent (N) and colorant (F). In the context of a further particularly preferred embodiment, a method according to the invention is characterized in that steps (1) and (2), or, if step (3) is performed, steps (1), (2) and (3), are carried out within a period of a maximum of 48 hours, preferably a maximum of 24 hours, more preferably a maximum of 12 hours, and particularly preferably a maximum of 4 hours. The pre-treatment agent (V) is thus applied to the keratin fibers in the form of a leave-on agent. The Cs-C24-alkyl carboxylic acids (V1) or their salts can be deposited in this way in the form of a smooth and closed film on the keratin fibers and thus form a uniform and smooth substrate, which allows a particularly uniform and homogeneous deposition of the coloring compounds on the keratin surface when the colorant (F) is applied. The pre-treatment agent (V) can be applied to moistened or dry keratinous material. The application can be carried out with the aid of a brush or nozzle, for example, or the user can use their gloved hand. After application, the pre-treatment agent can be massaged in fora period of 10 to 120 seconds. The keratin fibers are then preferably dried. However, it is also possible to start the drying process of the keratinous fibers directly after the application of the pre-treatment agent (V). During drying, the cosmetic carrier present in the pre-treatment agent (V) evaporates or vaporizes. If this is largely a solvent such as ethanol, for example, drying can be particularly fast and effective. Drying can take place either in the air or under the influence of heat, for example with the aid of a heating hood or a hairdryer. The drying of the keratin fibers or hair can be accelerated by heat treatment. Heat treatment means that the keratin material is brought into contact with a heated device or that this heated device is applied to or on the keratin material. Furthermore, the keratin material can also be brought into contact with warm / hot air for heat treatment. The appliance can be a hair dryer, a hair dryer, a heating hood, a straightening iron, a curling iron or an infrared lamp, for example. Furthermore, it was found that it is preferable if the treatment temperature during the heat treatment is between 40°C and 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and most preferably from 45°C to 60°C. In other words, it has been found to be particularly preferred if the heat treatment is carried out with a device which is heated to a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and most preferably from 45°C to 60°C. In the second step of the method according to the invention, the colorant (F) is applied to moistened or dry keratinous material. The application can be carried out with the aid of a brush or nozzle, for example, or the user can use their gloved hand. In a particularly preferred embodiment, the coloring agent can be applied to the dry keratin material or hair. In this case, the final hydrolysis and condensation of the organic Ci-Ce-alkoxysilanes occurs due to the amount of water contained in the colorant (F) itself or a subsequently added amount of water. In a further embodiment, a method characterized by the following is particularly preferred (1-1) Application of the pretreatment agent (V) to the keratinous fibers, (1-2) drying of the keratinous fibers still exposed to the pretreatment agent (V), the drying preferably taking place at a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and very particularly preferably from 45°C to 60°C, and the (2-1) Application of the dyeing agent (F) to the keratinous fibers dried in step (1-2). After step (2-1), the colorant (F) can in principle be washed out with water or with water and with the aid of a shampoo. However, the color intensities and wash fastnesses were particularly good if the dye was not rinsed out after application, but the keratinous fibers still covered with the dye were dried. In other words, it is also particularly preferred to apply the colorant (F) as a leave-on product. The drying of the keratin fibers covered with the colorant (F) can be accelerated by heat treatment. Heat treatment means that the keratin material is brought into contact with a heated device or that this heated device is applied to or on the keratin material. Furthermore, the keratin material can also be brought into contact with warm / hot air for heat treatment. For example, you can use a hair dryer, a hair dryer, a heating hood, a straightening iron, a curling iron or an infrared lamp. In a particularly preferred embodiment, a method according to the invention is characterized in that the heat treatment is carried out by using a hair dryer, a hair dryer, a heating hood, a straightening iron, a curling iron or an infrared lamp. Furthermore, it was found that it is preferable if the treatment temperature during the heat treatment is between 40°C and 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and most preferably from 45°C to 60°C and most preferably from 50°C to 100°C. In other words, it has been found to be particularly preferred if the heat treatment is carried out with a device which is heated to a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and most preferably from 45°C to 60°C. In a further particularly preferred embodiment, a method according to the invention is characterized by the following steps in the order indicated: (1-1) Application of the pretreatment agent (V) to the keratinous fibers, (1-2) Drying of the keratinous fibers still coated with the pretreatment agent (V), wherein the drying is preferably carried out at a temperature of 40°C to 210°C, preferably of 45°C to 150°C, more preferably at a temperature of 45°C to 100°C, even more preferably at a temperature of 45°C to 80°C, and most preferably at a temperature of 45°C to 60°C, (2-1) Application of the colorant (F) to the keratinous fibers, and (2-2) Drying of the keratinous fibers still impregnated with the colorant (F), the drying preferably taking place at a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and very particularly preferably from 45°C to 60°C. During drying in step (2-2), the water or solvent(s) present in the colorant (F) evaporates and the film formed by condensation of the Ci-Ce-alkoxysilanes hardens. Drying can take place either in the air or under the influence of heat, for example with the aid of a heating hood or a hairdryer. In one embodiment, the coloring agent can be applied to the dry keratin material or hair. If the colorant (F) additionally contains one or more organic Ci-Ce-alkoxysilanes, it has been found to be particularly preferable if the colorant is low in water. In this case, the hydrolysis and condensation of the organic Ci-Ce-alkoxysilanes occurs due to the amount of water contained in the colorant (F) itself or added subsequently. To complete the hydrolysis and condensation reactions, in this case a defined amount of water is preferably applied to the keratinous fibers which are still coated with the colorant (F), whereby the weight of the amount of water applied in this step should be at most twice as great as the weight of the colorant (F) applied in step (2). By additionally applying the defined amount of water, post-condensation or post-crosslinking of the organic Ci-Ce-alkoxsilanes can be initiated. This post-crosslinking ensures further solidification of the film or coating. In a further particularly preferred embodiment, a method according to the invention comprises the following steps in the order indicated: (1-1) Application of the pretreatment agent (V) to the keratinous fibers, (1-2) Drying of the keratinous fibers still coated with the pretreatment agent (V), wherein the drying is preferably carried out at a temperature of 40°C to 210°C, preferably of 45°C to 150°C, more preferably at a temperature of 45°C to 100°C, even more preferably at a temperature of 45°C to 80°C, and most preferably at a temperature of 45°C to 60°C, (2-1) Application of the colorant (F) to the keratinous fibers, and (2-2) Applying a defined amount of water to the keratinous fibers which are still impregnated with the dyeing agent (F), the weight of the amount of water applied in step (2-2) being at most twice the weight of the dyeing agent (F) applied in step (2-1), and (2-3) Drying of the keratinous fibers still impregnated with the colorant (F), the drying preferably taking place at a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and very particularly preferably from 45°C to 60°C. In step (2-2), however, the colorant (F) should not be washed out, i.e. the additional amount of water applied to the hair exposed to the colorant (F) should be so large that the Ci-Cealkoxsilanes can come into contact with a sufficient amount of water, but the colorant (F) is not washed off the hair fiber or flows down. As the work leading to this invention has shown, this is the case when the weight of the amount of water applied in step (2-2) is at most twice as great as the weight of the colorant (F) applied in step (2-1). The quantity of water and the quantity of colorant (F) are understood here to be the quantities by weight. Therefore, if 50g of colorant (F) is applied to the hair / keratin material in step (2-1), a maximum of 100g of water may be applied to the hair / keratin material in step (2-2). The defined amount of water can be distributed on the keratin fibers in step (2-2) and mixes with the colorant (F), which is also still on the keratin fibers. This mixing can be supported by massaging in by hand or with a brush. It is particularly preferred if step (2-2) is carried out. In particular, a method comprising (2-1) applying the colorant (F) to dry keratinous fibers, and (2-2) the application of a defined quantity of water to the keratinous fibers which are still coated with the colorant (F), and the (2-3) Drying of the keratinous fibers still coated with the dye (F), wherein the total amount of water used for mixing with the colorant in step (2-2) is at most twice the weight of the colorant (F) used in step (2-1). Furthermore, a method comprising (2-1) applying the colorant (F) to dry keratin material, and (2-2) the application of a defined quantity of water to the keratinous fibers which are still coated with the colorant (F), and the (2-3) Drying of the keratinous fibers still coated with the dye (F), wherein the total amount of water used for mixing with the colorant in step (2-2) is at most equal to the weight of the colorant (F) used in step (2-1). In step (2-3), the colorant (F) still covering the keratinous fibers is the colorant (F) mixed or diluted with the defined amount of water. Therefore, if 50g of colorant (F) is applied to the hair / keratin fibers in step (2-1), a maximum of 50g of water may be applied to the hair / keratin fibers in step (2-2) with at most the same amount of water. Between steps (2-1) and (2-2) (if step (2-2) is carried out) there may be a period of a few seconds to 60 minutes, preferably from 30 seconds to 30 minutes. After step (2-2), the keratin niches are dried in step (2-3) without first washing out the colorant (F). During drying in step (2-3), the water or solvent(s) present in the colorant evaporates and the film formed by condensation of the Ci-Ce-alkoxysilanes hardens. Drying can take place either in the air or under the influence of heat, for example with the aid of a heating hood or a hairdryer. Preparation of the readv-to-use colorant In one embodiment, the coloring agent (F) according to the invention can be applied directly to the keratin fibers or the hair in the form in which it is provided to the user. In this form, the colorant (F) according to the invention also represents the ready-to-use agent and can be provided, for example, in a bottle, a container, a tube or a can. A major advantage of this form of application is the convenient and simple form of application, as the user can simply remove the colorant (F) from the bottle or container in which it was provided and apply it to the keratin fibers. Mixing, shaking and / or homogenizing with one or more other components or compositions is not necessary in this embodiment. In particular, if the colorant (F) additionally also contains the organic Ci-Ce-alkoxysilanes, the colorant (F) can also be prepared first in or before step (2) of the process. This preparation can be carried out, for example, by mixing a silane blend containing the organic Ci-Ce-alkoxysilanes (F2) with a further agent containing the coloring compound(s) (F1). In this embodiment, the ingredients (F1) and (F2) can be present in two separately packaged containers and can be combined or mixed together to produce the ready-to-use colorant (F). Even if this embodiment means more effort for the user, it may be preferred to increase the storage stability of the Ci-Ce-alkoxysilanes (F2), to avoid premature conglomeration between silane (F2) and coloring compound (F1). Application of the after-treatment agent The post-treatment agent (N) is preferably applied above all when the organic Ci-Ce-alkoxysilanes are applied after the colorant and are intended to form an uncolored film on the coloring compounds. If the colorant (F) does not contain any organic Ci-Ce-alkoxysilanes, it may also be preferable not to use the colorant as a leave-on product but to rinse it out. In the context of a further preferred embodiment, a method according to the invention is characterized by the following steps in the order indicated: (1-1) Application of the pretreatment agent (V) to the keratinous fibers, (1-2) Drying of the keratinous fibers still coated with the pretreatment agent (V), wherein the drying is preferably carried out at a temperature of 40°C to 210°C, preferably of 45°C to 150°C, more preferably at a temperature of 45°C to 100°C, even more preferably at a temperature of 45°C to 80°C, and most preferably at a temperature of 45°C to 60°C, (2-1) Application of the colorant (F) to the keratinous fibers, (2-2) Rinsing the colorant (F) out of the keratinous fibers, (2-3) If necessary, drying of the keratinous fibers rinsed in step (2-2), (3-1) Application of the after-treatment agent (N) to the keratinous fibers, and (3-2) Drying the keratinous fibers still exposed to the post-treatment agent (N), the drying preferably taking place at a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and very particularly preferably from 45°C to 60°C. After applying the dyeing agent in step (2-1) and before rinsing it out in step (2-2), the dyeing agent can also be left to act on the keratinous fibers for a period of 30 seconds to 60 minutes. Furthermore, it is also possible to first fix the coloring compounds by means of a film formed by the organic Ci-Ce-alkoxysilanes contained in the coloring agent. Due to the coloring compounds, this film is colored. The organic Ci-Ce-alkoxysilanes contained in the post-treatment agent (N) can then be used again to produce an uncolored film on the colored film. In the context of a further preferred embodiment, a method according to the invention is characterized by the following steps in the order indicated: (1-1) Application of the pretreatment agent (V) to the keratinous fibers, (1-2) Drying of the keratinous fibers still coated with the pretreatment agent (V), wherein the drying is preferably carried out at a temperature of 40°C to 210°C, preferably of 45°C to 150°C, more preferably at a temperature of 45°C to 100°C, even more preferably at a temperature of 45°C to 80°C, and most preferably at a temperature of 45°C to 60°C, (2-1) Application of the colorant (F) to the keratinous fibers, and (2-2) Drying of the keratinous fibers still impregnated with the colorant (F), the drying preferably taking place at a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and very particularly preferably from 45°C to 60°C. (3-1) Application of the post-treatment agent (N) to the keratinous fibers, and (3-2) Drying the keratinous fibers still exposed to the post-treatment agent (N), the drying preferably taking place at a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and very particularly preferably from 45°C to 60°C. Agent for pre-treatment In the processes described above, a pretreatment agent containing the C8-C24-alkylcarboxylic acid(s) and / or salts thereof (V1) in a solvent-based cosmetic carrier is particularly preferred. A second subject-matter of the present application is therefore an agent (V) for the pretreatment of keratinous fibers, in particular human hair, containing - based on the total weight of the pretreatment agent (V) - (V1) one or more linear or branched, saturated or mono or polyunsaturated alkylcarboxylic acids having 8 to 24 carbon atoms and / or salts thereof in a total amount of from 0.1 to 15.0% by weight, preferably from 0.5 to 10.0% by weight, more preferably from 2.0 to 8.0% by weight and very particularly preferably from 3.0 to 7.0% by weight, and (V2) one or more solvents selected from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate in a total amount of 1.0 to 99.0% by weight, preferably from 10.0 to 98.5% by weight, preferably from 30.0 to 98.0% by weight, still more preferably from 50.0 to 97.5% by weight and very particularly preferably from 70.0 to 97.0% by weight. Particularly preferred is an agent (V) for pretreating keratinous fibers, especially human hair, containing - based on the total weight of the pretreatment agent (V) - (V1) one or more C8-C24-alkylcarboxylic acids and / or salts thereof in a total amount of 0.5 to 10.0% by weight, and (V2) one or more solvents selected from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate in a total amount of 10.0 to 98.5% by weight. Very particularly preferred is an agent (V) for pretreating keratinous fibers, in particular human hair, containing - based on the total weight of the pretreatment agent (V) - (V1) one or more C8-C24-alkylcarboxylic acids and / or salts thereof in a total amount of 0.5 to 10.0% by weight, and (V2) one or more solvents selected from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate in a total amount of 30.0 to 98.0% by weight. Very particularly preferred is an agent (V) for pretreating keratinous fibers, in particular human hair, containing - based on the total weight of the pretreatment agent (V) - (V1) one or more C8-C24-alkylcarboxylic acids and / or salts thereof in a total amount of 0.5 to 10.0% by weight, and (V2) one or more solvents selected from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate in a total amount of 50.0 to 97.5% by weight. Avery particularly preferred product is also an agent (V) for pre-treating keratinous fibers, especially human hair, containing - based on the total weight of the pre-treatment agent (V) - (V1) one or more Cs-C24-alkylcarboxylic acids and / or salts thereof in a total amount of 0.5 to 10.0% by weight, and (V2) one or more solvents selected from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate in a total amount of 70.0 to 97.0% by weight. Very particularly preferred is an agent (V) for pretreating keratinous fibers, in particular human hair, containing - based on the total weight of the pretreatment agent (V) - (V1) one or more Cs-C24-alkylcarboxylic acids and / or salts thereof in a total amount of 0.5 to 10.0% by weight, and (V2) 70.0 to 97.0% by weight Ethanol. Very particularly preferred is an agent (V) for pretreating keratinous fibers, in particular human hair, containing - based on the total weight of the pretreatment agent (V) - (V1) one or more Cs-C24-alkylcarboxylic acids from the group consisting of stearic acid, isostearic acid and salts thereof in a total amount of 0.5 to 10.0% by weight, and (V2) 70.0 to 97.0% by weight Ethanol. It is understood that the ingredients (V1) and (v2) in the pre-treatment agent (V) can add up to a maximum of 100% by weight. If the pretreatment agent (V) also contains other components different from (V1) and (V2), then the sum of the amounts by weight of (V1) and (V2) is less than 100% by weight. The weights given here refer to the total weight of the pre-treatment agent (V). With regard to the other preferred embodiments of the pretreatment agent (V), the statements made regarding the method apply mutatis mutandis. Examples 1. Application of the pre-treatment agent The following pretreatment agent was prepared (unless otherwise specified, all data are given in% by weight of the active substance). Pretreatment agent (V) (V) (% by weight) Stearic acid 5.0 Ethanol ad 100 To remove any adhering components (moth powder, preservatives, etc.), strands of hair (Kerling type, shade 9-0 and Euronatur hair white) were pre-washed with a shampoo, rinsed with water and then dried. The strands cleaned in this way were stored for at least 72 hours. Dry hair strands were immersed in the pre-treatment agent (V) for 30 minutes at 40°C. The hair strands were removed from the pre-treatment agent (V) and dried immediately afterwards without rinsing with the aid of a standard hairdryer. 1.2. Microscopic image The dried strand of Kerling, Nuance 9-0 was viewed under a laser scanning microscope. The corresponding image is shown in Figure 1. The microscopic image shows that the fatty acid (stearic acid) has been deposited on the hair strand in the form of a very uniform film. 1.3. Determination of the surface free energy The surface energy (SFE) of keratin fibers or hair influences how cosmetic formulations interact with the surface of the fibers during application. The surface energy can be used to assess the condition of hair, as healthy hair always has a lower surface energy than damaged hair. All cosmetic products that are applied to the hair surface change the surface energy of the hair. For example, to improve the conditioning performance of the hair, the formulations should modify the surface of the treated hair and make it more hydrophobic, which reduces the surface energy. Analogous to J. Cosmet. Sci., 62, 127-137 (March / April 2011) the surface energy of different hair strands was determined. The values shown in the table below were found. The surface free energy (SFE) is given in mJ / m2 The unit mJ / m2 corresponds to the unit mN / m. SFE = surface free energy [measured in mJ / m2] Euronatur hair white SFE dispersive portion [mJ / m2] SFE polar part [mJ / m2] SFE polar + dispersive [mJ / m2] without application of the pretreatment agent (V) 31.4 2.1 33.5 with application of the pretreatment agent (V) 28.1 0.4 28.5 Euronaturhaar white is a relatively heavily damaged hair. By applying the pre-treatment agent (V) to strands of Euronatur hair white, the free surface energy was reduced and the hair was visibly hydrophobized and thus conditioned. Kerling 9-0 SFE dispersive portion [mJ / m2] SFE polar part [mJ / m2] SFE polar + dispersive [mJ / m2] Hair from the attachment area without application of the pretreatment agent (V) 24.3 0.0 24.3 Hair from the tip area without application of the pretreatment agent (V) 23.8 3.8 27.6 Hair from the attachment area with application of the pretreatment agent (V) 24.4 4.6 29.0 Hair from the tip area with application of the pretreatment agent (V) 28.5 1.0 29.5 In order to achieve good equalization, the dye should be applied to strands of hair that have as similar a free surface energy as possible over their entire length. This ensures that the colorant interacts with all areas of the hair surface to the same extent. Kerling 9-0 hair strands are hair strands that are less damaged than Kerling Euronatural white hair strands. However, the damage of Kerling 9-0 strands is more severe at the ends of the hair than at the roots. The determination of the free surface energies of hair strands not pre-treated with (V) shows that there is a relatively large difference in the SFE (polar + disperse) between the root and tip areas of the hair. Kerling 9-0 SF Etotal polar + dispersive [mJ / m2] Difference in SFEtotai between base and tip Hair from the attachment area without application of (V) 24.3 3.3 Hair from the tip area without application of (V) 27.6 If a pre-treatment with (V) was now carried out, the surface free energy (SFEtotai) was not reduced to the same extent, but the surface free energy was much better equalized to the same value over the entire length of the strand. Kerling 9-0 SFEtotai polar + dispersive [mJ / m2] Difference in SFEtotai between base and tip Hair from the attachment area with application of (V) 29.0 0.5 Hair from the tip area with application of (V) 29.5 The surface free energies (SFEtotai) between the different hair types could also be brought to almost the same value: SFEtotai polar + dispersive [mJ / m2] Kerling 9-0, application area with application of (V) 29.0 Kerling 9-0, tip area with application of (V) 29.5 Euronatural hair white, with application of (V) 28.5 By pretreating with (V), it was possible to equalize the surface energies (SFEtotai) of both differently damaged sections of the same hair strand and the hair surfaces of different hair types. In this way, it was possible to ensure that a coloring agent (F) applied to the hair strands after the pre-treatment agent (V) can interact with all surface areas in a comparable way and thus provide particularly reproducible colorings with the same intensity and a particularly good levelling capacity. 1.4. Dyeing the keratinous fibers with the colorant (F) Immediately after the pre-treatment described in section 1.3, ready-to-use colorants were applied to the hair strands. As a comparison, strands of hair not treated with the pre-treatment agent (V) were dyed with the dyes. The following ready-to-use colorants (F) were produced. Preparation of the silane blend In a 500ml round bottom flask, 23.4g ethanol (abs.) and 52.6g methyltriethoxysilane and 17.5g 3-aminopropyl)triethoxysilane were mixed together with stirring. This mixture was heated to 50°C with further stirring. Then 6.4g of a 1% solution of sodium hydroxide in water was added over a period of approx. 5 minutes. The temperature of the reaction mixture rose to 59°C and dropped to 55°C after the addition was completed. The mixture was stirred for a further 45 minutes at 50°C and then filled into an airtight glass container. The silane blend prepared in this way was incorporated into the following colorants (F) (all figures in% by weight unless otherwise stated): Coloring agent (F) (F1) (% by weight) (F2) (% by weight) Silan-Blend 10 10 Unipure Red LC 3079 (Pigment Red 7, CAS-No. 5281-04-9, Cl 15850) 1.0 1.0 Hexamethyldisiloxane 20 — Squalane — 20 Ethanol ad 100 ad 100 The ready-to-use colorant was applied to a dry strand of hair (1.0g colorant per 1.0g strand of hair). The dye was massaged in with the gloved hand until it was evenly distributed. One of the following aqueous agents (M) was then applied to the strand of hair still covered with the dye. Mittel (M) (M1) (% by weight) (M2) (% by weight) Maleic acid (98%) 0.076 — Benecel E4M (Hydroxypropyl Methyl cellulose, Ashland) 1.0 1.0 Water (dist.) ad 100 ad 100 By applying the agent (M), which consists mainly of thickened water, a defined amount of water was added to the hair strand still covered with the silane-containing colorant (F), thus completing the hydrolysis and condensation of the organic Ci-Ce-alkoxysilanes. The total amount of water (i.e. agent (M)) used to mix with the colorant (F) was half the amount of colorant (F) used. Thus, 0.5g of the agent (M) was applied per 1,0g hair strand. The agent (M) was massaged in with the gloved hand until it was evenly and completely mixed with the colorant (F). The strands of hair treated in this way were hung up in the air for 10 minutes and then dried with a standard hairdryer without rinsing. After drying, the strands were laid out under a daylight lamp and visually assessed by trained personnel. 1.5. Determination of washing fastnesses Each strand was then washed repeatedly by hand. Each strand was moistened with water, then a commercially available shampoo (Schauma 7-Krauter) was applied to the strand (0.25g shampoo per 1g hair) and massaged in with the fingers for 30 seconds. Then the strand was rinsed under running, lukewarm water for 1 minute and dried. The previously described process corresponds to a hair wash. For each subsequent hair wash the procedure was repeated. For hair strands of the Euronatur hair white type, the strands were visually assessed again under the daylight lamp after5 hair washes, 10 hair washes and 15 hair washes. For Kerling 9-0 hair strands, the strands were visually assessed again under the daylight lamp after 4 hair washes and 8 hair washes. The evaluation was based on the school grading system (1 = very high color intensity; 6 = very low color intensity) HW = Hair washes V = comparison; E = invention Euronatur hair white OHW immediately after dyeing 5 HW 10 HW 15 HW V without pretreatment with (V) Coloring with (F1) Mixing the colorant with (M1) intense red 1 intense red 2 red 3 red 3 E with pretreatment with (V) Coloring with (F1) Mixing the colorant with (M1) intense red 1 intense red 1 intense red 2 intense red 2 Kerling 9-0 OHW immediately after dyeing 4 HW 8 HW V without pretreatment with (V) Coloring with (F2) Mixing the colorant with (M2) red 2 light red 3-4 pale red 4 E with pretreatment with (V) Coloring with (F2) Mixing the colorant on head with (M2) intense red 1 red 2 light red 3

Claims

1. Method for dyeing keratinous fibers, in particular human hair, comprising the following steps in the order indicated:(1) Application of a pretreatment agent (V) to the keratinous fibers, wherein the pretreatment agent (V) contains:(V1) at least one straight-chain or branched, saturated or mono or polyunsaturated alkyl carboxylic acid having 8 to 24 carbon atoms and / or its salt,(2) Application of a colorant (F) to the keratinous fibers, wherein the colorant (F) contains: (F1) at least one coloring compound from the group consisting of pigments and directdrawing dyes, wherein pigments are coloring compounds which have a solubility in water at 25°C of less than 0.5g / L, and(3) optionally, application of a post-treatment agent (N) on the keratinous fibers, wherein at least one of the agents (F) and / or (N) contains at least one organic Ci-Ce-alkoxy silane and / or its hydrolysis and / or condensation products, and wherein no washing step takes place between steps (1) and (2).

2. Method according to claim 1, characterized in that the pretreatment agent (V) contains at least one C8-C24 alkyl carboxylic acid (V1) selected from the group consisting of dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), octadecanoic acid (stearic acid), isostearic acid (16-methylheptadecanoic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), tetracosanoic acid (lignoceric acid), petroselinic acid [(Z)-6-octadecenoic acid], palmitoleic acid [(9Z)-hexadec-9-enoic acid], oleic acid [(9Z)-octadec-9-enoic acid], elaidic acid [(9E)-octadec-9-enoic acid], erucic acid [(13Z)-docos-13-enoic acid], linoleic acid [(9Z, 12Z)-octadeca-9,12-dienoic acid, Linolenic acid [(9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid, Elaeostearic acid [(9Z,11E,13E)-octadeca-9,11,3-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoic acid], nervonic acid [(15Z)-tetracos-15-enoic acid] and / or their salts, particularly preferred from the group consisting of hexadecanoic acid (palmitic acid), octadecanoic acid (stearic acid) and / or their salts.

3. Method according to one of claims 1 to 2, characterized in that the pretreatment agent (V) -based on the total weight of the pretreatment agent (V) - contains one or more C8-C24 alkyl carboxylic acids and / or their salts (V1) in a total amount of 0.1 to 15.0% by weight, preferably from 0.5 to 10.0% by weight, more preferably from 2.0 to 8.0% by weight, and most preferably from 3.0 to 7.0% by weight.

4. Method according to one of claims 1 to 3, characterized in that the pretreatment agent (V) -based on the total weight of the pretreatment agent (V) - contains one or more solvents (V2) from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether,glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate in a total amount of 1.0 to 99.0% by weight, preferably from 10.0 to 98.5% by weight, more preferably from 30.0 to 98.0% by weight, still more preferably from 50.0 to 97.5% by weight and very particularly preferably from 70.0 to 97.0% by weight.

5. Method according to one of claims 1 to 4, characterized in that the colorant (F) - based on the total weight of the colorant (F) - contains one or more pigments (F1) in a total amount of 0.01 to 20.0% by weight, preferably 0.1 to 10.0% by weight, more preferably 0.2 to 5.0% by weight and most preferably 0.3 to 2.5% by weight.

6. Method according to one of claims 1 to 5, characterized in that the colorant (F) - based on the total weight of the colorant (F) - contains one or more direct dyes (F1) in a total amount of 0.01 to 20.0% by weight, preferably 0.1 to 10.0% by weight, more preferably 0.2 to 5.0% by weight and most preferably 0.3 to 2.5% by weight.

7. Method according to one of claims 1 to 6, characterized in that the colorant (F) and / or the posttreatment agent (N) contains at least one Ci-Ce-alkoxy silane of the formula (I) and / or its hydrolysis and / or condensation productsRiR2N-L-Si(OR3)a(R4)b (I), where - Ri, R2 independently represent a hydrogen atom or a Ci-Ce alkyl group,- L is a linear or branched divalent Ci-C2o alkylene group,- R3, R4 independently of one another represent a Ci-Ce alkyl group,- a stands for an integer from 1 to 3, and- b stands for the integer 3 - a.

8. Method according to one of claims 1 to 7, characterized in that the colorant (F) and / or the posttreatment agent (N) contains at least one O-Ce-alkoxy silane of the formula (II) and / or its hydrolysis and / or condensation productsR5Si(OR6)k(R7)m (II), where - Rs stands for a C1-C18 alkyl group, - Re stands for a Ci-Ce alkyl group, - R7 represents a Ci-Ce alkyl group - k is an integer from 1 to 3, and - m stands for the integer 3 - k.

9. Method according to one of claims 1 to 8, characterized in that the colorant (F) and / or the posttreatment agent (N) contains- at least one first Ci-Ce-alkoxy-silane selected from the group consisting of (3-aminopropyl)trimethoxysilane, (3-aminopropyl)-triethoxysilane, (2-aminoethyl)trimethoxy-silane, (2-aminoethyl)triethoxysilane, (3-dimethyl-aminopropyl)-trimethoxysilane, (3-dimethylamino-propyl)triethoxysilane, (2-dimethylamino-ethyl)trimethoxy-silane, (2-dimethylaminoethyl)-triethoxy-silane and / or their hydrolysis and / or condensation products, and- at least a second Ci-Ce-alkoxy-silane selected from the group consisting of methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxy-silane, hexyltrimethoxysilane, hexyltriethoxysilane, octyltrimethoxysilane, octyltriethoxysilane, dodecyltrimethoxysilane, dodecyltriethoxysilane and / or their hydrolysis and / or condensation products.

10. Method according to one of claims 1 to 9, characterized in that the coloring agent (F) and / or the after-treatment agent (N) - based on the total weight of the respective agent - contains one or more solvents from the group consisting of ethanol, isopropanol, 1,2-propylene glycol, 1,3-propylene glycol, ethylene glycol, 1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol,1,2-butylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, glycerol, phenoxyethanol, benzyl alcohol, poly-Ci-Ce-alkylene glycols, dimethyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate and glycerol carbonate in a total amount of 20 to 95% by weight, preferably from 30 to 85% by weight, more preferably from 40 to 80% by weight and most preferably from 45 to 75% by weight.

11. Method according to one of claims 1 to 10, characterized in that steps (1) and (2), or if a step (3) is carried out, steps (1), (2) and (3), are carried out within a period of at most 48 hours, preferably at most 24 hours, more preferably at most 12 hours and most preferably at most 4 hours.

12. Method according to one of claims 1 to 11, characterized by the following steps in the order indicated:(1-1) Application of the pretreatment agent (V) to the keratinous fibers,(1-2) Drying of the keratinous fibers still coated with the pretreatment agent (V), wherein the drying is preferably carried out at a temperature of 40°C to 210°C, preferably of45°C to 150°C, more preferably at a temperature of45°C to 100°C, even more preferably at a temperature of45°C to 80°C, and most preferably at a temperature of45°C to 60°C, (2-1) Application of the colorant (F) to the keratinous fibers, and(2-2) Drying of the keratinous fibers still impregnated with the colorant (F), the drying preferably taking place at a temperature of from 40°C to 210°C, preferably from 45°C to150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and very particularly preferably from 45°C to 60°C.

13. Method according to one of claims 1 to 11, characterized by the following steps in the order indicated:(1-1) Application of the pretreatment agent (V) to the keratinous fibers,(1-2) Drying of the keratinous fibers still coated with the pretreatment agent (V), wherein the drying is preferably carried out at a temperature of 40°C to 210°C, preferably of45°C to 150°C, more preferably at a temperature of45°C to 100°C, even more preferably at a temperature of45°C to 80°C, and most preferably at a temperature of45°C to 60°C,(2-1) Application of the colorant (F) to the keratinous fibers,(2-2) Rinsing of the colorant (F) from the keratinous fibers,(2-3) If necessary, drying of the keratinous fibers rinsed in step (2-2),(3-1) Application of the after-treatment agent (N) to the keratinous fibers, and(3-2) Drying the keratinous fibers still exposed to the post-treatment agent (N), the drying preferably taking place at a temperature of from 40°C to 210°C, preferably from 45°C to 150°C, more preferably from 45°C to 100°C, still more preferably from 45°C to 80°C and very particularly preferably from 45°C to 60°C.T +44(0)30 0300 2000A

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