Reductive dye removal with sulfinic acid derivatives in paste form

Abstract

A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers, which is packaged separately, comprises: a container (A) containing a cosmetic agent (a) and a container (B) containing a cosmetic agent (b), wherein the agent (a) in container (A)(a1) comprises one or more sulfinic acid derivatives from the group consisting of: (H2N)(NH)C(SO2H) formamidine sulfinic acid, HN(CH2SO2Na)2, disodium [(sulfinatomethyl)amino]methanesulfinate, HN(CH2SO2K)2, dipotassium [(sulfinatomethyl)amino]methanesulfinate, HN(CH2SO2H)2, [(sulfinomethyl)amino]methanesulfinic acid, N(CH2SO2Na)3, trisodium [bis(sulfinatomethyl)amino]methanesulfinate- N(CH2SO2K)3, tripotassium [bis(sulfinatomethyl)amino]methanesulfinate- N(CH2SO2H)3, [bis(sulfinomethyl)amino]methanesulfinic acid- H2NCH(CH3)SO2Na, sodium 1-aminoethane-1-sulfinate- H2NCH(CH3)SO2K, potassium 1-aminoethane-1-sulfinate- H2NCH(CH3)SO2H, 1-aminoethane-1-sulfinic acid,- HN(CH(CH3)SO2Na)2,Disodium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate- HN(CH(CH3)SO2K)2, Dipotassium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate- HN(CH(CH3)SO2H)2, 1-[(1-sulfinoethyl)amino]ethane-1-sulfinic acid- N(CH(CH3)SO2Na)3, Trisodium 1-[bis(1-sulfinatoethyl)amino]ethane-1-sulfinate- N(CH(CH3)SO2K)3, Tripotassium 1-[bis(1-sulfinatoethyl)amino]ethane-1-sulfinate and / or- N(CH(CH3)SO2H)3, 1-[bis(1-sulfinoethyl)amino]ethane-1-sulfinic acid contains,(a2) one or more fatty components from the group of C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, C12-C30 fatty acid esters, hydrocarbons and / or silicone oils,(a3) has a water content of not more than 10.0% by weight - based on the total weight of the product (a),- the product (b) in container (B)(b1) has a water content of at least 30.0% by weight - based on the total weight of the product (b),(b2) contains one or more alkalizing agents from the group consisting of ammonia, alkanolamines and / or basic amino acids, and (b3) has a pH of 7.5 to 12.5.

Description

The invention relates to multi-component packaging units (kit-of-parts) for the reductive decolorization of dyed keratin fibers, which contain containers (A) and (B) separately. Container (A) contains a cosmetic agent (a) formulated essentially without water, which includes at least one sulfinic acid derivative from one or more specific fatty components. Container (B) contains a cosmetic agent (b) that is an aqueous formulation, contains one or more alkalizing agents from the group consisting of ammonia, alkanolamines, and / or basic amino acids, and has a pH value of 7.5 to 12.5. The multi-component packaging unit described above is used in a process for the reductive decolorization of dyed keratin fibers. Hair toning and coloring products are an important type of cosmetic. They can be used to subtly or more intensely enhance natural hair color according to the individual's wishes, to achieve a completely different hair color, or to cover unwanted tones, such as gray. Common hair dyes are formulated based on either oxidative or direct dyes, depending on the desired color and longevity. Combinations of oxidative and direct dyes are also frequently used to achieve specific shades. Dyes based on oxidation dyes produce brilliant and permanent colors. However, they require the use of strong oxidizing agents, such as hydrogen peroxide solutions. These dyes contain oxidation dye precursors, known as developers and couplers. Under the influence of oxidizing agents or atmospheric oxygen, the developers react with each other or with one or more couplers to form the actual dyes. Hair dyes based on direct dyes are frequently used for temporary coloring. Direct dyes are dye molecules that adhere directly to the hair and do not require an oxidative process to develop the color. Important examples of this class of dyes include triphenylmethane dyes, azo dyes, anthraquinone dyes, and nitrobenzene dyes, which can each contain cationic or anionic groups. With all these coloring processes, there may be times when the coloring needs to be partially or completely reversed for various reasons. Partial removal of the color is advisable, for example, if the result is darker than desired. Conversely, complete removal of the color may be necessary in some cases. For instance, one might want to dye or tint their hair a specific shade for a particular occasion and then want to restore the original color after a few days. Various methods and techniques for color removal are already known from the literature. One method, well-established in the art, for reversing coloring is the oxidative decolorization of dyed hair, for example, using a standard bleaching agent. However, this process can damage the hair fibers due to the use of strong oxidizing agents. Furthermore, reductive processes for color removal have also been described. For example, European patent application EP 1 300 136 A2 discloses a method for hair treatment in which the hair is dyed in a first step and then reductively decolorized in a second step. In this process, the reductive decolorization is achieved by applying a formulation containing a dithionite salt and a surfactant. WO 2008 / 055756 A2 describes the reductive decolorization of keratin fibers using a mixture of a reducing agent and an absorbent. Documents WO 2012 / 069599, WO 2014 / 174230, and WO 2013 / 017862 describe various sulfinic acid derivatives in agents for the reductive removal of dyed hair. However, the formulation and the bleaching results of the agents described in these documents cannot yet be considered optimal. When using reductive bleaching agents, the bleaching process occurs through the reduction of the pigments present on the keratin fibers or hair. This reduction typically converts the pigments into their reduced leuco forms. During this process, the double bonds present in the pigments are reduced, thus disrupting the chromophore system and converting the pigment into a colorless form. The reduction of dyes generally requires the use of strong reducing agents, which can undergo undesirable reactions with oxidizing agents, such as atmospheric oxygen. Furthermore, reducing agents are often not very stable in aqueous solution and degrade more or less rapidly depending on the pH of the solution. For example, sodium dithionite, a known reductive decolorizing agent, is sensitive to atmospheric oxygen and degrades slowly in aqueous solution. Increasing the pH can slow down these degradation reactions. Adjusting the pH to a slightly alkaline level stabilizes aqueous dithionite solutions, allowing them to be stored for several weeks to months in the absence of oxygen.However, if the reductive decolorizing agents are to be stored for extended periods, if reliable exclusion of air cannot be guaranteed, or if high temperatures prevail during storage, packaging in solution, especially in aqueous solution, is not the method of choice. To circumvent this problem, prior art documents often describe the use of the reducing agents themselves as solids, for example, in powder form. However, this approach has several disadvantages. The reducing agents must be dissolved in a cosmetic carrier before use. If they are incorporated into the cosmetic carrier in their pure form, for example as a powder, dust may be generated which, if inhaled, can irritate the user's airways. If the particle size of the powdered reducing agent is too large, there is a risk that the reducing agents will not dissolve sufficiently, resulting in an uneven and unattractive decolorization. Incomplete dissolution also means that the reducing agent is not available in its full quantity for the decolorization process, so the decolorization result may be weaker than intended. If the solubility of the particle-formed reducing agent in the cosmetic carrier is poor, the user is still forced to mix the solid reducing agent and the cosmetic carrier together for a very long time. This process is inconvenient and time-consuming for the user and therefore highly undesirable. The object of the present invention was therefore to provide a decolorizing agent for removing the color from dyed keratin fibers, which would remove the color from the dyed keratin fibers as uniformly and effectively as possible. The decolorizing agent should be characterized by high storage stability and retain its high decolorizing power even after long storage periods at high temperatures. The ready-to-use decolorizing agent should be easy for the user to prepare and apply comfortably. In particular, no dust should be produced during application. Furthermore, the consistency of the decolorizing agent should be optimized so that it can be easily applied and spread on the user's head, while at the same time not dripping off the keratin fibers. Finally, the decolorizing effect should also be improved compared to decolorizing agents known from the prior art. Surprisingly, it has now been found that the aforementioned problem can be solved perfectly if the reductive decolorizing agent is packaged as a multi-component kit, which, when packaged separately, comprises two containers (A) and (B), each containing the cosmetic products (a) and (b), respectively. Product (a) contains at least one sulfinic acid derivative selected from a specific group, as well as one or more lipid components. Product (a) is essentially anhydrous. Product (b) is an aqueous cosmetic carrier containing one or more alkalizing agents from the group consisting of ammonia, alkanolamines, and / or basic amino acids, and has a pH value of 7.5 to 12.5.For the reductive decolorization of dyed keratinous fibers, the user mixes agents (a) and (b) shortly before application and thus produces the ready-to-use decolorizing agent. A first object of the present invention is a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers, which is assembled separately from one another and comprises: a container (A) containing a cosmetic agent (a) and a container (B) containing a cosmetic agent (b), wherein the agent (a) in container (A)(a1) comprises one or more sulfinic acid derivatives from the group consisting of: (H2N)(NH)C(SO2H) formamidine sulfinic acid, HN(CH2SO2Na)2, disodium [(sulfinatomethyl)amino]methanesulfinate, HN(CH2SO2K)2, dipotassium [(sulfinatomethyl)amino]methanesulfinate, HN(CH2SO2H)2, [(sulfinomethyl)amino]methanesulfinic acid, N(CH2SO2Na)3, trisodium [bis(sulfinatomethyl)amino]methanesulfinate- N(CH2SO2K)3, tripotassium [bis(sulfinatomethyl)amino]methanesulfinate- N(CH2SO2H)3, [bis(sulfinomethyl)amino]methanesulfinic acid- H2NCH(CH3)SO2Na, sodium 1-aminoethane-1-sulfinate- H2NCH(CH3)SO2K, Potassium 1-aminoethane-1-sulfinate-H2NCH(CH3)SO2H,1-Aminoethane-1-sulfinic acid,- HN(CH(CH3)SO2Na)2, Disodium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate- HN(CH(CH3)SO2K)2, Dipotassium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate- HN(CH(CH3)SO2H)2, 1-[(1-sulfinoethyl)amino]ethane-1-sulfinic acid- N(CH(CH3)SO2Na)3, Trisodium 1-[Bis(1-sulfinatoethyl)amino]ethane-1-sulfinate- N(CH(CH3)SO2K)3, Tripotassium 1-[Bis(1-sulfinatoethyl)amino]ethane-1-sulfinate and / or- N(CH(CH3)SO2H)3, 1-[Bis(1-sulfinoethyl)amino]ethane-1-sulfinic acid contains,(a2) contains one or more fatty components from the group consisting of C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, C12-C30 fatty acid esters, hydrocarbons and / or silicone oils,(a3) has a water content of not more than 10.0% by weight - based on the total weight of the product (a),- the product (b) in container (B)(b1) has a water content of at least 30.0% by weight - based on the total weight of the product (b),(b2) contains one or more alkalizing agents from the group consisting of ammonia, alkanolamines and / or basic amino acids, and (b3) has a pH of 7.5 to 12.5. The agents (a) and (b) contained in the containers (A) and (B) of the multi-component packaging unit according to the invention are characterized by exceptionally good storage stability, even at high temperatures. Furthermore, the work leading to this invention has shown that the two agents (a) and (b) can be mixed together very easily and quickly, and that a very uniform decolorizing result can be achieved with the ready-to-use decolorizing agent obtained after mixing. Moreover, no dust is produced when the agents (a) and (b) are mixed. In addition, it has been shown that hair damage could be reduced when using the decolorizing agent according to the invention (i.e., when using the mixture of agents (a) and (b)). Surprisingly, the decolorizing result was also improved compared to agents known from the prior art. The term keratinous fibers, keratin-containing fibers, or keratin fibers refers to furs, wool, feathers, and especially human hair. Although the agents according to the invention are primarily suitable for lightening and dyeing keratin fibers or human hair, there is nothing in principle to preclude their use in other areas as well. The term "dyed keratin fibers" refers to keratin fibers that have been dyed with conventional cosmetic dyes known to those skilled in the art. In particular, "dyed keratin fibers" includes fibers dyed with oxidative dyes and / or direct dyes known from the prior art. In this context, explicit reference is made to the relevant monographs, e.g., Kh. Schrader, Grundlagen und Rezepturen der Kosmetika (Fundamentals and Recipes of Cosmetics), 2nd edition, Hüthig Buch Verlag, Heidelberg, 1989, which reflect the relevant knowledge of those skilled in the art. The agents (a) and (b) each contain the essential ingredients of the invention in a cosmetic carrier, which in the case of agent (a) is essentially anhydrous and in the case of agent (b) contains water. The composition (a) is formulated essentially without anhydrous liquid and can be in solid form, as a powder, or as a paste. The formulation of composition (a) as a paste is preferred. Composition (a) can also comprise a solvent-containing carrier. Furthermore, the content of the fat components from group (a2) in composition (a) can be chosen to be so high that the fat components act as the carrier of composition (a) and consequently—along with the sulfinic acid derivatives (a1)—constitute the main component of composition (a). The aqueous cosmetic agent (b) may, for example, be an agent with a suitable aqueous or aqueous-alcoholic carrier. For the purpose of reductive decolorization, such carriers may be, for example, creams, emulsions, gels, or surfactant-containing foaming solutions, such as shampoos, foam aerosols, foam formulations, or other preparations suitable for application to hair. Particularly preferably, the agents for the reductive color removal from keratinous fibers are creams, emulsions, or free-flowing gels. Particularly preferably, the agent (b) is formulated as an emulsion. Means (a) in container (A) The multi-component packaging unit (kit-of-parts) according to the invention comprises a first container (A) which contains a cosmetic agent (a). The agent (a) is characterized by its content of one or more sulfinic acid derivatives (a1) selected from the group consisting of: (H2N)(NH)C(SO2H) formamidine sulfinic acid, HN(CH2SO2Na)2, disodium [(sulfinatomethyl)amino]methanesulfinate-HN(CH2SO2K)2, dipotassium [(sulfinatomethyl)amino]methanesulfinate-HN(CH2SO2H)2, [(sulfinomethyl)amino]methanesulfinic acid-N(CH2SO2Na)3, trisodium [bis(sulfinatomethyl)amino]methanesulfinate-N(CH2SO2K)3, tripotassium [bis(sulfinatomethyl)amino]methanesulfinate-N(CH2SO2H)3, [bis(sulfinomethyl)amino]methanesulfinic acid-H2NCH(CH3)SO2Na, sodium 1-aminoethane-1-sulfinate- H2NCH(CH3)SO2K, potassium 1-aminoethane-1-sulfinate- H2NCH(CH3)SO2H, 1-aminoethane-1-sulfinic acid,- HN(CH(CH3)SO2Na)2, disodium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate- HN(CH(CH3)SO2K)2,Dipotassium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate- HN(CH(CH3)SO2H)2, 1-[(1-Sulfinoethyl)amino]ethane-1-sulfinic acid- N(CH(CH3)SO2Na)3, Trisodium 1-[Bis(1-sulfinatoethyl)amino]ethane-1-sulfinate- N(CH(CH3)SO2K)3, Tripotassium 1-[Bis(1-sulfinatoethyl)amino]ethane-1-sulfinate and / or- N(CH(CH3)SO2H)3, 1-[Bis(1-sulfinoethyl)amino]ethane-1-sulfinic acid, Formamidine sulfinic acid is also known as thiourea dioxide or aminoiminomethanesulfinic acid. It has the structure of formula (I) but can also exist as its tautomers. Formamidine sulfinic acid has the CAS number 1758-73-2 and is commercially available from various suppliers, such as Sigma-Aldrich. Disodium[(sulfinatomethyl)amino]methanesulfinate is the disodium salt of [(sulfinomethyl)-amino]methanesulfinic acid and has the structure of formula (II) Dipotassium [(sulfinatomethyl)amino]methanesulfinate is the dipotassium salt of [(sulfinomethyl)-amino]methanesulfinic acid and has the structure of formula (III) [(Sulfinomethyl)amino]methanesulfinic acid has the structure of formula (IV). Trisodium[bis(sulfinomethyl)amino]methanesulfinate is the trisodium salt of [bis(sulfinomethyl)amino]methanesulfinic acid and has the structure of formula (V). Tripotassium[bis(sulfinatomethyl)amino]methanesulfinate is the tripotassium salt of [bis(sulfinomethyl)-amino]methanesulfinic acid and has the structure of formula (VI) [Bis(sulfinomethyl)amino]methanesulfinic acid has the structure of formula (VII). Sodium 1-aminoethane-1-sulfinate is the sodium salt of 1-aminoethane-1-sulfinic acid and has the structure of formula (VIII) Potassium 1-aminoethane-1-sulfinate is the potassium salt of 1-aminoethane-1-sulfinic acid and has the structure of formula (IX) 1-Aminoethane-1-sulfinic acid has the structure of formula (X) Disodium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate is the disodium salt of 1-[(1-Sulfinoethyl)-amino]ethane-1-sulfinic acid and has the structure of formula (XI). Dipotassium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate is the dipotassium salt of 1-[(1-Sulfinoethyl)amino]ethane-1-sulfinic acid and has the structure of formula (XII). 1-[(1-Sulfinoethyl)amino]ethane-1-sulfinic acid has the structure of formula (XIII). Trisodium 1-[Bis(1-sulfinatoethyl)amino]ethane-1-sulfinate is the trisodium salt of 1-[Bis(1-sulfinoethyl)amino]ethane-1-sulfinic acid and has the structure of formula (XIV) Tripotassium 1-[Bis(1-sulfinoethyl)amino]ethane-1-sulfinate is the tripotassium salt of 1-[Bis(1-sulfinoethyl)amino]ethane-1-sulfinic acid and has the structure of formula (XV) 1-[Bis(1-sulfinoethyl)amino]ethane-1-sulfinic acid has the structure of formula (XVI) The preparation of the compounds of formulas (II) to (XVI) is described, for example, in EP 0914516 B1. Formamidine sulfinic acid was best formulated in paste form, as it dispersed very well in the fatty carrier and was very stable in this form. Furthermore, exceptionally good decolorization results were obtained when using formamidine sulfinic acid. Furthermore, when using the ready-to-use decolorizing agent - i.e. after mixing the formamidine sulfinic acid-containing agent (a) with the aqueous carrier (b) - the odor development was particularly low. A particularly preferred multi-component packaging unit (kit-of-parts) is therefore characterized in that the agent (a) in container (A)(a1) contains formamidine sulfinic acid as a sulfinic acid derivative (H2N)(NH)C(SO2H). Furthermore, the sulfinic acid derivative(s) from group (a1) are preferably used in specific quantity ranges. Preferably, the substantially anhydrous formulation (a) contains the sulfinic acid derivative(s) from group (a1) in a total amount of 0.1 to 50.0 wt.%, preferably 1.0 to 30.0 wt.%, more preferably 1.5 to 20.0 wt.%, and particularly preferably 2.5 to 10.5 wt.%. All quantities mentioned here refer to the total amount of all sulfinic acid derivatives from group (a1) contained in the formulation (a), which is expressed as a percentage of the total weight of the formulation (a). A multi-component packaging unit (kit-of-parts) is therefore particularly preferred, characterized in that the agent (a) in container (A) contains - based on the total weight of the agent (a) - one or more sulfinic acid derivatives from group (a1) in a total amount of 0.1 to 50.0 wt.%, preferably 1.0 to 30.0 wt.%, more preferably 1.5 to 20.0 wt.% and particularly preferably 2.5 to 10.5 wt.%. Particularly preferred is a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers, characterized in that the agent (a) in container (A)(a1) contains 0.1 to 50.0 wt.% formamidine sulfinic acid (alternative name thiourea dioxide). Particularly preferred is a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers, characterized in that the agent (a) in container (A)(a1) contains 1.0 to 30.0 wt.% formamidine sulfinic acid (alternative name thiourea dioxide). Particularly preferred is a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers, characterized in that the agent (a) in container (A)(a1) contains 1.5 to 20.0 wt.% formamidine sulfinic acid (alternative name thiourea dioxide). Particularly preferred is a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers, characterized in that the agent (a) in container (A)(a1) contains 2.5 to 10.5 wt.% formamidine sulfinic acid (alternative name thiourea dioxide). In principle, the product (a) can contain other reducing agents in addition to the sulfinic acid derivatives from group (a1). However, it has been found that some reducing agents are incompatible with the sulfinic acid derivatives of group (a1), impair storage stability, or lead to surprisingly high levels of hair damage. In particular, sulfites, such as sodium sulfite (Na₂SO₃), potassium sulfite (K₂SO₃), ammonium sulfite ((NH₄)₂SO₃), or bisulfites, have proven to be less than ideal when used in combination with the sulfinic acid derivatives of formula (a1), as the hair felt brittle and straw-like after bleaching when these combinations were used. For this reason, a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is preferred, characterized in that the agent (a) in container (A) contains sulfites in a total amount of less than 1.0 wt.%, preferably less than 0.5 wt.%, further preferably less than 0.1 wt.%, based on the total weight of the agent (a). In other words, a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is preferred, characterized in that the agent (a) in container (A) contains - based on the total weight of the agent (a) -(a#) sulfites from the group consisting of sodium sulfite (Na2SO3), potassium sulfite (K2SO3) and ammonium sulfite ((NH4)2SO3) in a total amount of less than 1.0 wt.%, preferably less than 0.5 wt.%, further preferably less than 0.1 wt.%. As the second essential ingredient (a2) of the invention, the agent (a) contains at least one or more fatty components from the group consisting of C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, C12-C30 fatty acid esters, hydrocarbons and / or silicone oils. For the purposes of this invention, “fatty components” are understood to be organic compounds with a solubility in water at room temperature (22 °C) and atmospheric pressure (760 mmHg) of less than 1 wt.%, preferably less than 0.1 wt.%. The definition of fat components explicitly includes only uncharged (i.e., nonionic) compounds. Fat components possess at least one saturated or unsaturated alkyl group with at least 12 carbon atoms. The molecular weight of the fat components is a maximum of 5000 g / mol, preferably a maximum of 2500 g / mol, and particularly preferably a maximum of 1000 g / mol. The fat components are neither polyoxyalkylated nor polyglycerylated compounds. In this context, polyoxyalkylated compounds are those compounds in whose synthesis at least two alkylene oxide units were reacted. Similarly, polyglyceryl compounds are those compounds in whose synthesis at least two glycerol units were reacted. Since, in the context of the present invention, only non-ionic substances are explicitly considered as fat components, charged compounds, such as fatty acids and the salts of fatty acids, do not fall under the group of fat components. Preferred fat components are those from the group of C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, C12-C30 fatty acid esters and hydrocarbons. C12-C30 fatty alcohols can be saturated, mono- or polyunsaturated, linear or branched fatty alcohols with 12 to 30 carbon atoms. Examples of preferred linear saturated C12-C30 fatty alcohols are dodecan-1-ol (dodecyl alcohol, lauryl alcohol), tetradecan-1-ol (tetradecyl alcohol, myristyl alcohol), hexadecan-1-ol (hexadecyl alcohol, cetyl alcohol, palmityl alcohol), octadecan-1-ol (octadecyl alcohol, stearyl alcohol), arachiyl alcohol (eicosan-1-ol), heneicosyl alcohol (heneicosan-1-ol) and / or behenyl alcohol (docosan-1-ol). Preferred linear unsaturated fatty alcohols are (9Z)-Octadec-9-en-1-ol (oleyl alcohol), (9E)-Octadec-9-en-1-ol (elaidyl alcohol), (9Z,12Z)-Octadeca-9,12-dien-1-ol (linoleyl alcohol), (9Z,12Z,15Z)-Octadeca-9,12,15-trien-1-ol (linolenoyl alcohol), Gadoleyl alcohol ((9Z)-Eicos-9-en-1-ol), Arachidone alcohol ((5Z,8Z,11Z,14Z)-Eicosa-5,8,11,14-tetraen-1-ol), Erucyl alcohol ((13Z)-Docos-13-en-1-ol) and / or Brassidyl alcohol ((13E)-Docosen-1-ol). The preferred representatives for branched fatty alcohols are 2-octyl-dodecanol, 2-hexyl-dodecanol and / or 2-butyl-dodecanol. For the purposes of the present invention, a C12-C30 fatty acid triglyceride is understood to be the triester of the trihydric alcohol glycerol with three equivalents of fatty acid. Both structurally identical and different fatty acids within a triglyceride molecule can participate in the ester formation. According to the invention, fatty acids are understood to be saturated or unsaturated, unbranched or branched, unsubstituted or substituted C12-C30 carboxylic acids. Unsaturated fatty acids can be monounsaturated or polyunsaturated. In an unsaturated fatty acid, its C12-C30 double bond(s) can have a cis or trans configuration. Fatty acid triglycerides are characterized by a particular suitability in which at least one of the ester groups is formed from glycerol with a fatty acid selected from dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic 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-trienic acid, Elaeostearinic acid [(9Z,11E,13E)-Octadeca-9,11,3-trienic acid], Arachidonic acid [(5Z,8Z,11Z,14Z)-Icosa-5,8,11,14-tetraenic acid] and / or Nervonic acid [(15Z)-Tetracos-15-enoic acid]. The fatty acid triglycerides can also be of natural origin. The fatty acid triglycerides or mixtures thereof found in soybean oil, peanut oil, olive oil, sunflower oil, macadamia nut oil, moringa oil, apricot kernel oil, marula oil and / or, if applicable, hydrogenated castor oil are particularly suitable for use in the product (a). A C12-C30 fatty acid monoglyceride is defined as the monoester of the trihydric alcohol glycerol with one equivalent of fatty acid. Either the central hydroxyl group of the glycerol or the terminal hydroxyl group of the glycerol can be esterified with the fatty acid. C12-C30 fatty acid monoglycerides are characterized by their particular suitability, in which a hydroxyl group of the glycerol is esterified with a fatty acid, the fatty acids being selected from dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic 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, elaeostearinic acid [(9Z,11E,13E)-Octadeca-9,11,3-trienoic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-Icosa-5,8,11,14-tetraenoic acid] or nervonic acid [(15Z)-Tetracos-15-enoic acid]. A C12-C30 fatty acid diglyceride is defined as the diester of the trihydric alcohol glycerol with two equivalents of fatty acid. Either the central and one terminal hydroxyl group of the glycerol can be esterified with two equivalents of fatty acid, or both terminal hydroxyl groups of the glycerol can be esterified with one fatty acid each. The glycerol can be esterified with either two structurally identical or two different fatty acids. Fatty acid diglycerides are characterized by their particular suitability, in which at least one of the ester groups starting from glycerol is formed with a fatty acid selected from dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic 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-trienic acid, Elaeostearinic acid [(9Z,11E,13E)-Octadeca-9,11,3-trienic acid], Arachidonic acid [(5Z,8Z,11Z,14Z)-Icosa-5,8,11,14-tetraenic acid] and / or Nervonic acid [(15Z)-Tetracos-15-enoic acid]. A C12-C30 fatty acid ester, as defined in the present invention, is a monoester of a fatty acid and an aliphatic, monohydric alcohol, wherein the alcohol comprises up to 6 carbon atoms. Suitable alcohols include, for example, ethanol, n-propanol, isopropanol, 1-butanol, isobutanol, tert-butanol, n-pentanol, isopentanol, or n-hexanol. Ethanol and isopropanol are preferred. Preferred C12-C30 fatty acid esters are those esters formed upon esterification of the alcohols ethanol and / or isopropanol with one of the fatty acids 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), 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-trienic acid, elaeostearinic acid [(9Z,11E,13E)-Octadeca-9,11,3-trienic acid], arachidonic acid [(5Z,8Z,11Z,14Z)-Icosa-5,8,11,14-tetraenoic acid] and / or nervonic acid [(15Z)-Tetracos-15-enoic acid] are formed. Among the fatty acid esters, isopropyl myristate is particularly favored. Hydrocarbons are compounds consisting exclusively of carbon and hydrogen atoms, with 8 to 250 carbon atoms, preferably with 8 to 150 carbon atoms. Particularly preferred in this context are aliphatic hydrocarbons such as mineral oils, liquid paraffin oils (e.g., paraffinum liquidum or paraffinum perliquidum), isoparaffin oils, semi-solid paraffin oils, paraffin waxes, hard paraffin (paraffinum solidum), petrolatum, and polydecenes. Liquid paraffin oils (paraffinum liquidum and paraffinum perliquidum) have proven particularly suitable in this context. Paraffinum liquidum, also known as white oil, is especially preferred as the hydrocarbon. Paraffinum liquidum is a mixture of purified, saturated, aliphatic hydrocarbons, consisting largely of hydrocarbon chains with a carbon chain distribution of 25 to 35 carbon atoms. Silicone oils within the meaning of the invention are understood to be hydrophobic compounds containing at least one Si atom, preferably several Si atoms, having a molar weight of at most 5000 g / mol and being liquid at room temperature (22 °C) and atmospheric pressure (760 mmHg), i.e. the melting point of silicone oils is (at atmospheric pressure) below 22°C. A particularly preferred multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is characterized in that the agent (a) in container (A)(a2) contains one or more fatty components from the group consisting of C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, C12-C30 fatty acid esters and / or hydrocarbons. A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is also preferred, characterized in that the agent (a) in container (A)(a2) contains one or more fatty components from the group consisting of dodecan-1-ol (dodecyl alcohol, lauryl alcohol), tetradecan-1-ol (tetradecyl alcohol, myristyl alcohol), hexadecan-1-ol (hexadecyl alcohol, cetyl alcohol, palmityl alcohol), octadecan-1-ol (octadecyl alcohol, stearyl alcohol), arachidyl alcohol (eicosan-1-ol), heneicosyl alcohol (heneicosan-1-ol) and / or behenyl alcohol (docosan-1-ol), (9Z)-octadec-9-en-1-ol (oleyl alcohol), (9E)-octadec-9-en-1-ol (Elaidyl alcohol), (9Z,12Z)-Octadeca-9,12-dien-1-ol (linoleyl alcohol), (9Z,12Z,15Z)-Octadeca-9,12,15-trien-1-ol (linolenoyl alcohol), Gadoleyl alcohol ((9Z)-Eicos-9-en-1-ol), Arachidon alcohol ((5Z,8Z,11Z,14Z)-Eicosa-5,8,11,14-tetraen-1-ol),Erucyl alcohol ((13Z)-docos-13-en-1-ol) and / or brassidyl alcohol ((13E)-docosen-1-ol), 2-octyl-dodecanol, 2-hexyl-dodecanol and / or 2-butyl-dodecanol. A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is also preferred, characterized in that the agent (a) in container (A)(a2) contains one or more fatty components from the group of fatty acid triglycerides, in which at least one of the ester groups is formed starting from glycerol with a fatty acid selected from dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), tetracosanoic acid (lignoceric acid), octadecanoic acid (stearic 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, Elaeostearinic acid [(9Z,11E,13E)-Octadeca-9,11,3-trienoic acid],Arachidonic acid [(5Z,8Z,11Z,14Z)-Icosa-5,8,11,14-tetraenoic acid] and / or nervonic acid [(15Z)-Tetracos-15-enoic acid]. A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is also preferred, characterized in that the agent (a) in container (A)(a2) contains one or more fatty components from the group of hydrocarbons, which is formed from mineral oils, liquid paraffin oils, isoparaffin oils, semi-solid paraffin oils, paraffin waxes and / or hard paraffin (paraffinum solidum), petrolatum and polydecenes. The total content of the fat components (a2) in the compound (a) has proven to be a key factor in reducing dust formation. A reduction in dust formation occurs even with the use of small amounts of fat components. However, to ensure the most complete dust removal possible, it has proven optimal to use the fat components (a2) in a total amount of at least 10 wt.%. For this reason, it is particularly preferred if the compound (a) contains the fat components (a2) in a total amount of 10.0 to 90.0 wt.%, preferably 20.0 to 86.0 wt.%, more preferably 25.0 to 84.0 wt.%, and most preferably 30.0 to 80.0 wt.%.Furthermore, when the fat components (a2) were used in the specified preferred and particularly preferred total amounts in the mean (a), the reducing agent could be effectively protected against the effects of atmospheric oxygen and the storage stability could be significantly improved in this way. A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is therefore explicitly preferred, characterized in that the agent (a) in container (A) contains – based on the total weight of the agent (a) – one or more fat components from group (a2) in a total amount of 10.0 to 90.0 wt.%, preferably 20.0 to 86.0 wt.%, more preferably 25.0 to 84.0 wt.% and particularly preferably 30.0 to 80.0 wt.%. The use of hydrocarbons has proven particularly effective in reducing dust formation and inertizing the reducing agent against atmospheric oxygen. In particular, paraffin oils and paraffin waxes are especially well-suited to encapsulating the sulfinic acid derivatives from group (a1) in a paste-like form, thus transforming them into a very stable paste. For this reason, it is explicitly preferred to use one or more hydrocarbons as the reducing agent (a2) in a total amount of 15.0 to 90.0 wt.%, preferably 20.0 to 85.0 wt.%, more preferably 25.0 to 80.0 wt.%, and most preferably 30.0 to 75.0 wt.%. All weight values ​​are again based on the total weight of all hydrocarbons contained in the compound (a), which is related to the total weight of the compound (a). An explicitly preferred multi-component packaging unit (kit-of-parts) is therefore characterized in that the agent (a) in container (A)(a2) contains one or more hydrocarbons in a total amount of 15.0 to 90.0 wt.%, preferably 20.0 to 85.0 wt.%, more preferably 25.0 to 80.0 wt.% and particularly preferably 30.0 to 75.0 wt.% - based on the total weight of the agent (a). A further characteristic and essential feature of the composition (a) is that it (a3) ​​is formulated in a substantially anhydrous form. The term "substantially anhydrous" here means that the water content of the composition (a) is at most 10.0 wt.%. Preferably, however, the water content of the composition (a) is below 10.0 wt.% and is preferably at most 8.0 wt.%, more preferably at most 5.0 wt.%, even more preferably at most 3.0 wt.%, and most preferably at most 1.0 wt.%. All values ​​expressed here are percentages by weight of the total weight of the composition (a). A low water content may be desirable on average (a) to integrate various hydrophilic ingredients (e.g., perfumes or hydrophilic conditioning agents) into the product, in addition to the sulfinic acid derivatives (a1) and the lipid components (a2). These hydrophilic ingredients can, for example, first be pre-dissolved in water and then emulsified or dispersed in the lipid components (a2) with the aid of surfactants. In this case, the lipid components (a2) also act as a carrier, and a water-in-oil emulsion is formed. In the product (a), additional ingredients or active substances containing water in certain percentages can also be used. It has been found that a water content of up to 10% by weight does not significantly impair the storage stability of the product (a). However, to achieve optimal storage stability even at high temperatures, it has proven advantageous if the water content of the agent (a) is at a value of at most 8.0 wt.-%, preferably at most 5.0 wt.%, more preferably at most 3.0 wt.% and particularly preferably at most 1.0 wt.% - based on the total weight of the agent (a). Another particularly preferred multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is therefore characterized in that the agent (a) in container (A)(a3) has a water content of at most 8.0 wt.%, preferably at most 5.0 wt.%, further preferably at most 3.0 wt.% and particularly preferably at most 1.0 wt.% - based on the total weight of the agent (a). The product (a) may also contain additional ingredients or active substances. In particular, the use of non-ionic surfactants (a4) in product (a) has proven to be especially advantageous. It has been found that non-ionic surfactants exhibit very good compatibility with both the sulfinic acid derivatives (a1) and, in particular, with the fatty components (a2), so that product (a) can be produced easily and reproducibly and does not separate during storage. The use of one or more non-ionic surfactants has also resulted in optimal miscibility with product (b). The non-ionic surfactant(s) can be used, for example, in total amounts of 0.1 to 15.0 wt.%, preferably 0.5 to 12.5 wt.%, more preferably 1.0 to 10.0 wt.% and particularly preferably 1.5 to 8.0 wt.% - based on the total weight of the agent (a). A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is also preferred, characterized in that the agent (a) in container (A) additionally contains (a4) one or more non-ionic surfactants in a total amount of 0.1 to 15.0 wt.%, preferably 0.5 to 12.5 wt.%, more preferably 1.0 to 10.0 wt.% and particularly preferably 1.5 to 8.0 wt.% - based on the total weight of the agent (a). Surfactants are defined as amphiphilic (bifunctional) compounds with at least one hydrophobic residue and at least one hydrophilic molecular part. The hydrophobic molecular part is usually a hydrocarbon chain with 10 to 30 carbon atoms. In the case of nonionic surfactants, the hydrophilic molecular part comprises an uncharged, highly polar structural unit. Non-ionic surfactants contain, as a hydrophilic group, for example a polyol group, a polyalkylene glycol ether group or a combination of polyol and polyglycol ether groups. Examples of such compounds include: - Addition products of 2 to 50 mol of ethylene oxide and / or 2 to 50 mol of propylene oxide to linear and branched fatty alcohols with 12 to 30 carbon atoms, namely fatty alcohol polyglycol ethers or fatty alcohol polypropylene glycol ethers or mixed fatty alcohol polyethers; - Addition products of 2 to 50 mol of ethylene oxide and / or 2 to 50 mol of propylene oxide to linear and branched fatty acids with 6 to 30 carbon atoms, namely fatty acid polyglycol ethers or fatty acid polypropylene glycol ethers or mixed fatty acid polyethers; - Addition products of 2 to 50 mol of ethylene oxide and / or 2 to 50 mol of propylene oxide to linear and branched alkylphenols with 8 to 15 carbon atoms in the alkyl group, namely alkylphenol polyglycol ethers or... Alkyl polypropylene glycol ethers, or mixed alkylphenol polyethers,- Addition products of 2 to 50 mol ethylene oxide and / or 2 to 50 mol propylene oxide to linear and branched fatty alcohols with 8 to 30 carbon atoms, to fatty acids with 8 to 30 carbon atoms, and to alkylphenols with 8 to 15 carbon atoms in the alkyl group, with a methyl or C2-C6 alkyl group end-capped residue, such as the types available under the trade names Dehydol®LS, Dehydol®LT (Cognis); - C12-C30 fatty acid mono- and diesters of addition products of 2 to 30 mol ethylene oxide to glycerol; - Addition products of 5 to 60 mol ethylene oxide to castor oil and hydrogenated castor oil; - Polyol fatty acid esters, such as the trade product Hydagen®HSP (Cognis) or Sovermol® types (Cognis),- polyalcoxilated triglycerides,- polyalcoxilated fatty acid alkyl esters of the formula (Tnio-1) R1CO-(OCH2CHR2)wOR3(Tnio-1) where R1CO represents a linear or branched, saturated and / or unsaturated acyl group with 6 to 22 carbon atoms, and R2 represents hydrogen or methyl.R3 represents linear or branched alkyl groups with 1 to 4 carbon atoms and w represents numbers from 2 to 20; - amine oxides; - hydroxy mixed ethers, as described, for example, in DE-OS 19738866; - sorbitan fatty acid esters and adsorption products of ethylene oxide to sorbitan fatty acid esters, such as polysorbates; - sugar fatty acid esters and adsorption products of ethylene oxide to sugar fatty acid esters; - adsorption products of ethylene oxide to fatty acid alkanolamides and fatty amines; - sugar surfactants of the type of alkyl and alkenyl oligoglycosides; or - sugar surfactants of the type of fatty acid N-alkyl polyhydroxyalkylamides. C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, and C12-C30 fatty acid esters do not possess a strongly polar end group (which is also evident from the low HLB values ​​of the compounds in this group). For the purposes of this invention, they are considered fatty components and, according to the definition of the present invention, therefore do not constitute nonionic surfactants. Furthermore, the composition (a) may additionally contain one or more nonionic polymers (a5). The nonionic polymer(s) may, for example, be used in total amounts of 0.1 to 15.0 wt.%, preferably 0.2 to 10.5 wt.%, more preferably 0.25 to 7.5 wt.%, and particularly preferably 0.3 to 5.0 wt.% – based on the total weight of the composition (a). A further particularly preferred multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is characterized in that the agent (a) in container (A) additionally contains (a5) one or more non-ionic polymers in a total amount of 0.1 to 15.0 wt.%, preferably 0.2 to 10.5 wt.%, more preferably 0.25 to 7.5 wt.% and particularly preferably 0.3 to 5.0 wt.% - based on the total weight of the agent (a). Polymers are defined as macromolecules with a molecular weight of at least 1000 g / mol, preferably at least 2500 g / mol, and particularly preferably at least 5000 g / mol, which consist of identical, repeating organic units. Polymers are produced by polymerization of one type of monomer or by polymerization of different, structurally distinct types of monomers. If the polymer is produced by polymerization of one type of monomer, it is called a homopolymer. If structurally distinct types of monomers are used in the polymerization, the term copolymer is used by those skilled in the art. The maximum molecular weight of the polymer depends on the degree of polymerization (number of polymerized monomers) and is also determined by the polymerization method. For the purposes of the present invention, it is preferred that the maximum molecular weight of the zwitterionic polymer (d) is not more than 10⁷ g / mol, preferably not more than 10⁶ g / mol, and particularly preferably not more than 10⁵ g / mol. Non-ionic polymers are characterized by the fact that they have no charges, i.e., non-ionic polymers within the meaning of the present invention are produced by homo- or copolymerization of uncharged monomers. Examples of suitable nonionic polymers include vinylpyrrolidone / vinyl acrylate copolymers, polyvinylpyrrolidone, vinylpyrrolidone / vinyl acetate copolymers, polyethylene glycols, ethylene / propylene / styrene copolymers and / or butylene / ethylene / styrene copolymers. Means (b) in container (B) The multi-component packaging unit according to the invention comprises a second container (B) which contains an agent (b). This agent (b) is a cosmetic carrier formulation which has a water content of at least 30.0% by weight – based on the total weight of the agent (b) – contains one or more alkalizing agents from the group consisting of ammonia, alkanolamines and / or basic amino acids and has a pH value of 7.5 to 12.5. In a preferred embodiment, the agent (b) is formulated such that its water content is at least 40.0 wt.%, preferably at least 50.0 wt.%, more preferably at least 55.0 wt.% and most preferably at least 60.0 wt.% - based on the total weight of the agent (b). A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is also preferred, characterized in that the agent (b) in container (B)(b1) has a water content of at least 40.0 wt.%, preferably at least 50.0 wt.%, more preferably at least 55.0 wt.% and most preferably at least 60.0 wt.% - based on the total weight of the agent (b). In the course of the work leading to this invention, it was found that the pH of the ready-to-use decolorizing agent is preferably adjusted to an alkaline level to achieve optimal decolorizing effect. The sulfinic acid derivatives of group (a1) exhibited their best effect at a pH of 7.0 to 13.0. The alkalizing agent necessary for adjusting the pH is present in the aqueous agent (b). In this way, it can be reliably ensured that contact between the sulfinic acid derivatives (a1) and the alkalizing agent only occurs shortly before application, after mixing agents (a) and (b). It has been found that the reductively decolorizing sulfinic acid derivatives (a1) were best able to diffuse into the hair fiber when nitrogenous compounds such as ammonia, alkanolamines and / or basic amino acids were used as alkalizing agents. According to the invention, a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is characterized in that the agent (b) in container (B)(b2) contains one or more alkalizing agents from the group consisting of ammonia, alkanolamines and / or basic amino acids. The pH values ​​of the present invention were measured using a glass electrode of type N 61 from Schott at a temperature of 22 °C. The alkanolamines usable in the composition (b) according to the invention are preferably selected from primary amines with a C2-C6 alkyl backbone bearing at least one hydroxyl group. Preferred alkanolamines are selected from the group consisting of 2-aminoethanol-1-ol (monoethanolamine), 3-aminopropan-1-ol, 4-aminobutan-1-ol, 5-aminopentan-1-ol, 1-aminopropan-2-ol, 1-aminobutan-2-ol, 1-aminopentan-2-ol, 1-aminopentan-3-ol, 1-aminopentan-4-ol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropan-1,2-diol, and 2-amino-2-methylpropan-1,3-diol. According to the invention, particularly preferred alkanolamines are selected from 2-aminoethanol-1-ol and / or 2-amino-2-methylpropan-1-ol. A particularly preferred embodiment is therefore characterized in that the composition (b) according to the invention contains an alkanolamine selected from 2-aminoethanol-1-ol and / or 2-amino-2-methylpropan-1-ol as an alkalizing agent. For the purposes of this invention, an amino acid is defined as an organic compound whose structure contains at least one protonable amino group and at least one -COOH or -SO3H group. Preferred amino acids are aminocarboxylic acids, in particular α-(alpha)-aminocarboxylic acids and ω-aminocarboxylic acids, with α-aminocarboxylic acids being particularly preferred. According to the invention, basic amino acids are understood to be those amino acids which have an isoelectric point pl of greater than 7.0. Basic α-aminocarboxylic acids contain at least one asymmetric carbon atom. Within the scope of the present invention, both possible enantiomers can be used as specific compounds or mixtures thereof, particularly as racemates. However, it is especially advantageous to use the naturally occurring isomeric form, usually in the L-configuration. The basic amino acids are preferably selected from the group consisting of arginine, lysine, ornithine, and histidine, particularly preferably from arginine and lysine. In a further particularly preferred embodiment, a composition according to the invention is therefore characterized in that the alkalizing agent is a basic amino acid from the group consisting of arginine, lysine, ornithine, and / or histidine. Furthermore, a multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers is also preferred, characterized in that the agent (b) in container (B)(b2) contains one or more alkalizing agents from the group consisting of ammonia, 2-aminoethanol-1-ol (monoethanolamine), 3-aminopropan-1-ol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropan-1,2-diol, 2-amino-2-methylpropan-1,3-diol, arginine, lysine, ornithine and / or histidine. Preferred compositions (b) according to the invention may also contain mixtures of alkalizing agents, such as a mixture of various alkanolamines, a mixture of basic amino acids, and / or a mixture of alkanolamines and basic amino acids. The alkalizing agents are particularly preferred in certain combinations: 2-Aminoethanol / 2-Amino-2-methylpropan-1-ol; 2-Aminoethanol / Arginine; 2-Aminoethanol / Lysine; 2-Aminoethanol / Ornithine; 2-Aminoethanol / Histidine; 2-Amino-2-methylpropan-1-ol / Arginine; 2-Amino-2-methylpropan-1-ol / Lysine; 2-Amino-2-methylpropan-1-ol / Ornithine; 2-Amino-2-methylpropan-1-ol / Histidine; Arginine / Lysine; Arginine / Ornithine; arginine / histidine; lysine / ornithine; Lysine / Histidine and / or Orithine / Histidine. Although the pH of the agent (b) is in the alkaline range, the agent (b) could contain small amounts of acidifying agents in addition to the alkalizing agent for fine-tuning the desired pH. According to the invention, preferred acidifying agents are food acids, such as citric acid, acetic acid, malic acid, or tartaric acid, as well as dilute mineral acids. For fine-tuning the desired pH value, one or more acids from the group consisting of citric acid, tartaric acid, malic acid, lactic acid, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, methanesulfonic acid, benzoic acid, malonic acid, oxalic acid, and / or 1-hydroxyethane-1,1-diphosphonic acid have proven suitable. Preferably, the acids selected are from the group consisting of citric acid, tartaric acid, malic acid, lactic acid, methanesulfonic acid, oxalic acid, malonic acid, benzoic acid, hydrochloric acid, sulfuric acid, phosphoric acid, and / or 1-hydroxyethane-1,1-diphosphonic acid. The pH of the aqueous agent (b) is adjusted to a value of 7.5 to 12.5, preferably 8.0 to 12.0, more preferably 8.5 to 11.5 and particularly preferably 9.0 to 11.0. According to the invention, a multi-component packaging unit (kit-of-parts) is characterized in that the agent (b) in container (B)(b3) has a pH value of 7.5 to 12.5, preferably 8.0 to 12.0, more preferably 8.5 to 11.5 and particularly preferably 9.0 to 11.0. The agent (b) is provided as a liquid preparation to which further surfactants can be added. These are preferably selected from anionic, zwitterionic, amphoteric and nonionic surfactants. As anionic surfactants, the agent (b) can, for example, contain fatty acids, alkyl sulfates, alkyl ether sulfates and ether carboxylic acids with 10 to 20 C atoms in the alkyl group and up to 16 glycol ether groups in the molecule. The agent (b) may also contain one or more zwitterionic surfactants such as betaines, N-alkyl-N,N-dimethylammonium glycinate, N-acyl-aminopropyl-N,N-dimethylammonium glycinate, and 2-alkyl-3-carboxymethyl-3-hydroxyethyl-imidazolines. According to the invention, suitable compositions (b) are further characterized in that the composition (b) additionally contains at least one amphoteric surfactant. Preferred amphoteric surfactants are N-alkylglycines, N-alkylpropionic acids, N-alkylaminobutyric acids, N-alkyliminodipropionic acids, N-hydroxyethyl-N-alkylamidopropylglycines, N-alkyltaurines, N-alkylsarcosines, 2-alkylaminopropionic acids, and alkylaminoacetic acids. Particularly preferred amphoteric surfactants are N-cocosalkylaminopropionate, N-cocosacylaminoethylaminopropionate, and C12-C18 acylsarcosine. It has proven particularly advantageous if the agent (b) additionally contains non-ionic surfactants (b4). Preferred non-ionic surfactants are: alkyl polyglycosides, alkylene oxide addition products to fatty alcohols and fatty acids, each with 10 to 60 moles of ethylene oxide per mole of fatty alcohol or fatty acid, and fatty acid triglycerides ethoxylated with 10 to 60 ethylene oxide units. Also particularly preferred is a multi-component packaging unit (kit-of-parts) characterized in that the agent (b) in container (B) additionally contains one or more non-ionic surfactants from the group of C12-C30 fatty alcohols ethoxylated with 10 to 60 ethylene oxide units and / or fatty acid triglycerides ethoxylated with 10 to 60 ethylene oxide units. The non-ionic, zwitterionic, amphoteric and / or anionic surfactants can be used in amounts of 0.1 to 25.0 wt.%, preferably 0.3 to 15.0 wt.% and most preferably 0.5 to 5.0 wt.% - based on the total weight of the agent (b). In the optimally formulated, ready-to-use decolorizing agent, the viscosity is adjusted so that the agent is thin enough to ensure sufficient diffusion of all active ingredients from the agent into the hair fiber, yet thick enough to prevent dripping during application. For this reason, the ready-to-use decolorizing agents preferably contain a thickener. The thickener is particularly preferably incorporated into the aqueous agent (b). According to another preferred embodiment, the thickening agent is an anionic, synthetic polymer. Preferred anionic groups are the carboxylate and sulfonate groups. Examples of anionic monomers that can be used to construct polymeric anionic thickeners include acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic anhydride, and 2-acrylamido-2-methylpropanesulfonic acid. The acidic groups can be present wholly or partially as sodium, potassium, ammonium, mono-, or triethanolammonium salts. Preferred monomers are maleic anhydride, and in particular 2-acrylamido-2-methylpropanesulfonic acid and acrylic acid. Preferred anionic homopolymers are uncrosslinked and crosslinked polyacrylic acids. Allyl ethers of pentaerythritol, sucrose, and propylene can be preferred crosslinking agents. Such compounds are commercially available, for example, under the trademark Carbopol®. Also preferred is the homopolymer of 2-acrylamido-2-methylpropanesulfonic acid, which is commercially available, for example, under the name Rheothik®11-80. Within this first embodiment, it may be further preferred to use copolymers of at least one anionic monomer and at least one nonionic monomer. Regarding the anionic monomers, reference is made to the substances listed above. Preferred nonionic monomers are acrylamide, methacrylamide, acrylic esters, methacrylic esters, itaconic mono- and diesters, vinylpyrrolidone, vinyl ethers, and vinyl esters. Preferred anionic copolymers are, for example, copolymers of acrylic acid, methacrylic acid, or their C1-C6 alkyl esters, as marketed under the INCI declaration Acrylates Copolymers. A preferred commercial product is, for example, Aculyn®33 from Rohm & Haas. Copolymers of acrylic acid, methacrylic acid, or their C1-C6 alkyl esters and the esters of an ethylene-unsaturated acid and an alkoxylated fatty alcohol are also preferred. Suitable ethylene-unsaturated acids include, in particular, acrylic acid, methacrylic acid, and itaconic acid; suitable alkoxylated fatty alcohols include, in particular, steareth-20 or ceteth-20. Such copolymers are marketed by Rohm & Haas under the trade name Aculyn®22 and by National Starch under the trade names Structure®2001 and Structure®3001. Preferred anionic copolymers include acrylic acid-acrylamide copolymers and, in particular, polyacrylamide copolymers with sulfonic acid group-containing monomers. A particularly preferred anionic copolymer consists of 70 to 55 mol% acrylamide and 30 to 45 mol% 2-acrylamido-2-methylpropanesulfonic acid, wherein the sulfonic acid group is present wholly or partially as a sodium, potassium, ammonium, mono-, or triethanolammonium salt. This copolymer can also be crosslinked, with polyolefinically unsaturated compounds such as tetraallyloxythane, allyl sucrose, allyl pentaerythritol, and methylenebisacrylamide being preferably used as crosslinking agents. Such a polymer is contained in the commercial products Sepigel® 305 and Simulgel® 600 from SEPPIC.The use of these compounds, which contain a hydrocarbon mixture (C13-C14 isoparaffin or isohexadecane) and a non-ionic emulsifier (Laureth-7 or polysorbate-80) in addition to the polymer component, has proven to be particularly advantageous within the framework of the invention. Polymers of maleic anhydride and methyl vinyl ether, especially those with cross-links, are also preferred thickening agents. A maleic anhydride-methyl vinyl ether copolymer cross-linked with 1,9-decadiene is commercially available under the name Stabileze®QM. Preferably, the composition according to the invention may additionally comprise at least one anionic acrylic acid and / or methacrylic acid polymer or copolymer. Preferred polymers of this type are: - Polymers, for example, consisting of at least 10 wt.% alkyl acrylate, 25 to 70 wt.% methacrylic acid, and optionally up to 40 wt.% of another comonomer; - Copolymers consisting of 50 to 75 wt.% ethyl acrylate, 25 to 35 wt.% acrylic acid, and 0 to 25 wt.% other comonomers, which are known. Suitable dispersions of this type are commercially available, for example, under the trade name Latekoll®D (BASF); - Copolymers consisting of 50 to 60 wt.% ethyl acrylate, 30 to 40 wt.% methacrylic acid, and 5 to 15 wt.% acrylic acid, crosslinked with ethylene glycol dimethacrylate. According to another embodiment, the thickening agent is a cationic synthetic polymer. Preferred cationic groups are quaternary ammonium groups. In particular, polymers in which the quaternary ammonium group is linked via a C1-C4 hydrocarbon group to a polymer backbone composed of acrylic acid, methacrylic acid, or their derivatives have proven to be especially suitable. Homopolymers of the general formula (HP-1), in R1 = -H or -CH 3 is, R2, R3 and R4 are independently selected from C 1 -C 4 -Alkyl, -alkenyl or -hydroxyalkyl groups, m = 1, 2, 3 or 4, n a natural number and X - A physiologically compatible organic or inorganic anion, as well as copolymers consisting essentially of the monomer units listed in formula (HP-1) and nonionic monomer units, are particularly preferred cationic polymeric gel-formers. Among these polymers, those are preferred according to the invention for which at least one of the following conditions applies: - R1 represents a methyl group - R2, R3 and R4 represent methyl groups - m has the value 2, Suitable physiologically compatible counterions X include, for example, halide ions, sulfate ions, phosphate ions, methosulfate ions, and organic ions such as lactate, citrate, tartrate, and acetate ions. Halide ions, especially chloride, are preferred. A particularly suitable homopolymer is poly(methacryloxy-ethyltrimethylammonium chloride), with the INCI name Polyquaternium-37, which can be cross-linked if desired. Cross-linking can be achieved, if desired, using polyolefinically unsaturated compounds such as divinylbenzene, tetraallyloxyethane, methylenebisacrylamide, diallyl ethers, polyallyl polyglyceryl ethers, or allyl ethers of sugars or sugar derivatives such as erythritol, pentaerythritol, arabitol, mannitol, sorbitol, sucrose, or glucose. Methylenebisacrylamide is a preferred cross-linking agent. The homopolymer is preferably used in the form of a non-aqueous polymer dispersion, which should have a polymer content of at least 30% by weight. Such polymer dispersions are commercially available under the names Salcare®SC 95 (approx. 50% polymer content, other components: mineral oil (INCI name: Mineral Oil) and tridecyl polyoxypropylene polyoxyethylene ether (INCI name: PPG-1-Trideceth-6)) and Salcare®SC 96 (approx. 50% polymer content, other components: a mixture of propylene glycol diesters with a mixture of caprylic and capric acid (INCI name: Propylene Glycol Dicaprylate / Dicaprate) and tridecyl polyoxypropylene polyoxyethylene ether (INCI name: PPG-1-Trideceth-6)). Copolymers with monomer units according to formula (HP-1) preferably contain acrylamide, methacrylamide, C1-C4 alkyl acrylates, and C1-C4 alkyl methacrylates as nonionic monomer units. Among these nonionic monomers, acrylamide is particularly preferred. These copolymers can also be cross-linked, as described above for the homopolymers. A copolymer preferred according to the invention is the cross-linked acrylamide-methacroyloxyethyltrimethylammonium chloride copolymer. Such copolymers, in which the monomers are present in a weight ratio of approximately 20:80, are commercially available as an approximately 50% non-aqueous polymer dispersion under the name Salcare®SC 92. In another preferred embodiment, naturally occurring thickening agents are used. Preferred thickening agents in this embodiment are, for example, nonionic guar gums. According to the invention, both modified and unmodified guar gums can be used. Unmodified guar gums are marketed, for example, under the trade name Jaguar®C by Rhone Poulenc. Modified guar gums preferred according to the invention contain C1-C6 hydroxyalkyl groups. The preferred groups are hydroxymethyl, hydroxyethyl, hydroxypropyl, and hydroxybutyl. Such modified guar gums are known in the prior art and can be produced, for example, by reacting the guar gums with alkylene oxides. The degree of hydroxyalkylation, which corresponds to the number of alkylene oxide molecules consumed in relation to the number of free hydroxy groups of the guar gums, is preferably between 0.4 and 1.2.Such modified Guargums are available commercially from Rhone Poulenc under the trade names Jaguar®HP8, Jaguar®HP60, Jaguar®HP120, Jaguar®DC 293 and Jaguar®HP105. Furthermore, suitable natural thickening agents are already known from the prior art. According to this embodiment, preferred materials include biosaccharide gums of microbial origin, such as scleroglucans or xanthangs, gums from plant exudates, such as gum arabic, ghatti gum, karaya gum, tragacanth gum, carrageenan gum, agar-agar, locust bean gum, pectins, alginates, starch fractions and derivatives such as amylose, amylopectin and dextrins, and cellulose derivatives such as methylcellulose, carboxyalkylcelluloses and hydroxyalkylcelluloses. Preferred hydroxyalkyl celluloses are, in particular, the hydroxyethyl celluloses marketed under the names Cellosize® by Amerchol and Natrosol® by Hercules. Suitable carboxyalkyl celluloses are, in particular, the carboxymethyl celluloses marketed under the names Blanose® by Aqualon, Aquasorb® and Ambergum® by Hercules, and Cellgon® by Montello. Starch and its derivatives are preferred. Starch is a storage substance of plants, found primarily in tubers and roots, cereal seeds, and fruits, and can be obtained in high yield from a wide variety of plants. This polysaccharide, which is insoluble in cold water but forms a colloidal solution in boiling water, can be obtained, for example, from potatoes, cassava, sweet potatoes, maranta, maize, cereals, rice, legumes such as peas and beans, bananas, or the pith of certain palm species (e.g., the sago palm). Natural, plant-derived starches and / or chemically or physically modified starches can be used according to the invention. Modification can be achieved, for example, by introducing different functional groups to one or more of the hydroxyl groups of the starch.These are typically esters, ethers, or amides of starch, optionally with substituted C1-C40 residues. A corn starch etherified with a 2-hydroxypropyl group, such as that sold by National Starch under the trade name Amaze®, is particularly advantageous. However, nonionic, fully synthetic polymers, such as polyvinyl alcohol and polyvinylpyrrolidone, are also suitable. Preferred nonionic, fully synthetic polymers are marketed, for example, by BASF under the trade name Luviskol®. Copolymers of butylene, ethylene, and styrene, or copolymers of propylene, ethylene, and styrene, are also particularly well suited as nonionic thickening agents according to the invention. In addition to their excellent thickening properties, such non-ionic polymers also enable a significant improvement in the sensory feel of the resulting preparations. Layered silicates (polymeric, crystalline sodium disilicates) have proven particularly suitable as inorganic thickening agents in accordance with the present invention. Clays, especially magnesium aluminum silicates such as bentonite, particularly smectites such as montmorillonite or hectorite, which may optionally be suitably modified, and synthetic layered silicates, such as the magnesium layered silicate marketed by Süd Chemie under the trade name Optigel®, are particularly preferred. The most suitable thickeners are those from the group consisting of celluloses, hydroxy-C2-C6-alkyl celluloses, carboxymethyl celluloses, alginic acid, (meth)acrylate polymers and / or xanthan gum. Therefore, it is particularly preferred to incorporate one or more thickeners from this group into the composition (b) according to the invention. Particularly preferred is a multi-component packaging unit (kit-of-parts) characterized in that the agent (b) in container (B) additionally contains (b4) one or more thickeners from the group consisting of celluloses, hydroxy-C2-C6-alkyl celluloses, carboxymethyl celluloses, alginic acid, (meth)acrylate polymers and / or xanthan gum. In a further particularly preferred embodiment, the agent (b) is in the form of a clear gel formulation and therefore does not contain any fat components itself. By mixing the agent (a), which contains one or more fat components (a2), with the preferably clear, gel-like agent (b), an emulsion is produced which may be an O / W emulsion. Particularly preferred is a multi-component packaging unit (kit-of-parts) characterized in that the agent (b) in container (B) contains – based on the total weight of the agent (b) – fatty components from the group consisting of C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, C12-C30 fatty acid esters, hydrocarbons and / or silicone oils in a total amount of less than 2.5 wt.%, preferably less than 1.0 wt.%, further preferably less than 0.5 wt.% and particularly preferably less than 0.1 wt.%. Particularly preferred is a multi-component packaging unit (kit-of-parts) characterized in that the agent (b) in container (B) contains – based on the total weight of the agent (b) – fatty components from the group consisting of C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, C12-C30 fatty acid esters and / or hydrocarbons in a total amount of less than 2.5 wt.%, preferably less than 1.0 wt.%, further preferably less than 0.5 wt.% and particularly preferably less than 0.1 wt.%. The definitions of the fat components correspond to the definitions of the fat components (a2) on average (a). Decolorization of dyed keratin fibers The multi-component packaging unit according to the invention is a system comprising means (a) and (b) that is used for decolorizing previously dyed keratin fibers, in particular human hair. The dyed keratin fibers are typically fibers that have been previously dyed with conventional oxidation dyes and / or direct dyes known to those skilled in the art. The decolorizing agents are suitable for removing stains produced on keratin fibers using oxidation dyes based on developer and coupler components. If the following compounds were used as developers, the resulting stains can be removed well, effectively, and with virtually no subsequent darkening by using the destaining agent: p-phenylenediamine, p-toluenediamine, N,N-bis-(β-hydroxyethyl)-p-phenylenediamine, 4-N,N-bis-(β-hydroxyethyl)-amino-2-methylaniline, 2-(β-hydroxyethyl)-p-phenylenediamine, 2-(α,β-dihydroxyethyl)-p-phenylenediamine, 2-hydroxymethyl-p-phenylenediamine, bis-(2-hydroxy-5-aminophenyl)-methane, p-aminophenol, 4-amino-3-methylphenol, 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, and / or 4,5-Diamino-1-(β-hydroxyethyl)-pyrazole. When the following compounds were used as couplers, the resulting stains can also be removed with very good destaining results: m-phenylenediamine derivatives, naphthols, resorcinol and resorcinol derivatives, pyrazolones and m-aminophenol derivatives. Suitable coupler substances include, in particular, 1-naphthol, 1,5-, 2,7- and 1,7-dihydroxynaphthalene, 5-amino-2-methylphenol, m-aminophenol, resorcinol, resorcinol monomethyl ether, m-phenylenediamine, 1-phenyl-3-methyl-pyrazolone-5, 2,4-dichloro-3-aminophenol, 1,3-bis-(2',4'-diaminophenoxy)-propane, 2-chloro-resorcinol, 4-chloro-resorcinol, 2-chloro-6-methyl-3-aminophenol, 2-amino-3-hydroxypyridine, 2-methylresorcinol, 5-methylresorcinol and 2-methyl-4-chloro-5-aminophenol.1-Naphthol, 1,5-Dihydroxynaphthalin, 2,7-Dihydroxynaphthalin, 1,7-Dihydroxynaphthalin, 3-Aminophenol, 5-Amino-2-methylphenol, 2-Amino-3-hydroxypyridin, Resorcin, 4-Chlorresorcin, 2-Chlor-6-methyl-3-aminophenol, 2-Methylresorcin, 5-Methylresorcin, 2,5-Dimethylresorcin und 2,6-Dihydroxy-3,4-dimethylpyridin. The substrate to be decolorized may also have been stained with direct dyes. Suitable direct dyes include, in particular, nitrophenylenediamines, nitroaminophenols, azo dyes, anthraquinones, or indophenols. Preferred direct dyes are those under the international names or trade names HC Yellow 2, HC Yellow 4, HC Yellow 5, HC Yellow 6, HC Yellow 12, Acid Yellow 1, Acid Yellow 10, Acid Yellow 23, Acid Yellow 36, HC Orange 1, Disperse Orange 3, Acid Orange 7, HC Red 1, HC Red 3, HC Red 10, HC Red 11, HC Red 13, Acid Red 33, Acid Red 52, HC Red BN, Pigment Red 57:1, HC Blue 2, HC Blue 12, Disperse Blue 3, Acid Blue 7, Acid Green 50, HC Violet 1, Disperse Violet 1, Disperse Violet 4, Acid Violet 43, Disperse Black 9, Acid Black 1, and Acid Black 52 known compounds as well as 1,4-diamino-2-nitrobenzene, 2-Amino-4-nitrophenol, 1,4-bis-(β-hydroxyethyl)-amino-2-nitrobenzene, 3-nitro-4-(β-hydroxyethyl)-aminophenol,2-(2'-Hydroxyethyl)amino-4,6-dinitrophenol, 1-(2'-Hydroxyethyl)amino-4-methyl-2-nitrobenzene, 1-Amino-4-(2'-hydroxyethyl)-amino-5-chloro-2-nitrobenzene, 4-Amino-3-nitrophenol, 1-(2'-Ureidoethyl)amino-4-nitrobenzene, 4-Amino-2-nitrodiphenylamine-2'-carboxylic 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-1-hydroxy-4-nitrobenzene. Furthermore, the substrates to be decolorized may also be colored with naturally occurring dyes, such as those contained in henna red, henna neutral, henna black, chamomile flower, sandalwood, black tea, buckthorn bark, sage, logwood, madder root, catechu, sedre and alkanna root. The decolorizing agents according to the invention are intended for the removal of these colorations and therefore preferably do not contain any dyes themselves, i.e., no oxidation dye precursors of the developer type and of the coupler type, and also no direct dyes. In a further preferred embodiment, a multi-component packaging unit (kit-of-parts) according to the invention is therefore characterized in that: - the total amount of all dyes and oxidation dye precursors contained in the compound (a) is at a value of at most 0.2 wt.%, preferably at most 0.1 wt.%, further preferably at most 0.05 wt.% and particularly preferably at most 0.01 wt.% - based on the total weight of the compound (a); and - the total amount of all dyes and oxidation dye precursors contained in the compound (b) is at a value of at most 0.2 wt.%, preferably at most 0.1 wt.%, further preferably at most 0.05 wt.% and particularly preferably at most 0.01 wt.% - based on the total weight of the compound (b). The multi-component packaging unit according to the invention is used for the reductive decolorization of dyed keratinous fibers. The agents (a) and (b) together form the ready-to-use decolorizing agent, which contains a reducing agent. For reasons of incompatibility and to avoid exothermic, uncontrollable reactions, the agents (a) and (b) therefore preferably do not contain an oxidizing agent. Oxidizing agents are understood here to include, in particular, those oxidizing agents that can also be used for oxidative decolorization, such as hydrogen peroxide and persulfates (potassium persulfate (alternatively potassium peroxodisulfate), sodium persulfate (sodium peroxodisulfate), and ammonium persulfate (alternatively ammonium peroxodisulfate)). Preferably, therefore, neither of the agents (a) and (b) contains the aforementioned oxidizing agents. In a further preferred embodiment, a multi-component packaging unit (kit-of-parts) according to the invention is therefore characterized in that: - the total amount of all oxidizing agents from the group of peroxides and persulfates contained in the compound (a) is at a value of at most 0.2 wt.%, preferably at most 0.1 wt.%, further preferably at most 0.05 wt.% and particularly preferably at most 0.01 wt.% - based on the total weight of the compound (a); and - the total amount of all oxidizing agents from the group of peroxides and persulfates contained in the compound (b) is at a value of at most 0.2 wt.%, preferably at most 0.1 wt.%, further preferably at most 0.05 wt.% and particularly preferably at most 0.01 wt.% - based on the total weight of the compound (b). Furthermore, the compositions (a) and (b) according to the invention may contain further active ingredients, excipients and additives, such as nonionic polymers such as vinylpyrrolidone / vinyl acrylate copolymers, polyvinylpyrrolidone, vinylpyrrolidone / vinyl acetate copolymers, polyethylene glycols and polysiloxanes; additional silicones such as volatile or non-volatile, straight-chain, branched or cyclic, cross-linked or non-cross-linked polyalkylsiloxanes (such as dimethicone or cyclomethicone), polyarylsiloxanes and / or polyalkylarylsiloxanes, in particular polysiloxanes with organofunctional groups, such as substituted or unsubstituted amines (amodimethicone), carboxyl, alkoxy and / or hydroxyl groups (dimethicone copolyols), linear polysiloxane(A)-polyoxyalkylene(B) block copolymers, grafted silicone polymers;Cationic polymers such as quaternized cellulose ethers, polysiloxanes with quaternary groups, dimethyldiallylammonium chloride polymers, acrylamide-dimethyldiallylammonium chloride copolymers, dimethylamino-ethyl methacrylate-vinylpyrrolidinone copolymers quaternized with diethyl sulfate, vinylpyrrolidinone-imidazolinium methochloride copolymers, and quaternized polyvinyl alcohol; zwitterionic and amphoteric polymers; anionic polymers such as polyacrylic acids or cross-linked polyacrylic acids; structuring agents such as glucose, maleic acid, and lactic acid; hair-conditioning compounds such as phospholipids, for example, lecithin and cephalins; perfume oils, dimethyl isosorbide, and cyclodextrins; fiber-improving agents, in particular mono-, di-, and oligosaccharides such as glucose, galactose, fructose, and lactose; colorants for coloring the product; Anti-dandruff agents such as piroctone olamines, zinc omadine and climbazole; amino acids and oligopeptides;Protein hydrolysates of animal and / or plant origin, as well as in the form of their fatty acid condensation products or, where applicable, anionically or cationically modified derivatives; vegetable oils; light protectants and UV blockers; active ingredients such as panthenol, pantothenic acid, pantolactone, allantoin, pyrrolidone carboxylic acids and their salts, and bisabolol; polyphenols, in particular hydroxycinnamic acids, 6,7-dihydroxycoumarins, hydroxybenzoic acids, catechins, tannins, leucoanthocyanidins, anthocyanidins, flavanones, flavones, and flavonols; ceramides or pseudoceramides; vitamins, provitamins, and vitamin precursors; plant extracts; fats and waxes such as fatty alcohols, beeswax, montan wax, and paraffins; Swelling and penetration agents such as glycerin, propylene glycol monoethyl ether, carbonates, hydrogen carbonates, guanidines, ureas, and primary, secondary, and tertiary phosphates; opacifying agents such as latex, styrene / PVP and styrene / acrylamide copolymers;Pearlescent agents such as ethylene glycol mono- and distearate as well as PEG-3 distearate; pigments and propellants such as propane-butane mixtures, N2O, dimethyl ether, CO2 and air. In this context, explicit reference is made to the well-known monographs, e.g. Kh. Schrader, Grundlagen und Rezepturen der Kosmetika (Fundamentals and Recipes of Cosmetics), 2nd edition, Hüthig Buch Verlag, Heidelberg, 1989, which reflect the relevant knowledge of the person skilled in the art. As previously described, the ready-to-use decolorizing agent is produced by mixing agents (a) and (b). In principle, agents (a) and (b) can be mixed in various ratios, such as (a) / (b) from 20:1 to 1:20. The agent (a) is preferably a solid, powdery, and in particular preferably a paste-like agent. However, to ensure that it is completely dissolved when mixed with agent (b), it is advantageous to use agent (b) in at least the same quantity as agent (a). It is further preferred to use agent (b) in an excess. In a further preferred embodiment, a multi-component packaging unit according to the invention is therefore characterized in that the quantities of the agent (a) in container (A) and of the agent (b) in container (B) are selected such that when producing the application mixture - i.e. when mixing the agents (a) and (b) - the mixing ratio (a) / (b) is at a value of 1:5 to 5:1, preferably 1:3 to 3:1, more preferably 1:2 to 2:1. To prepare the mixture, for example, the substance (a) from container (A) can be completely transferred into container (B), which already contains substance (b). In this case, the size of container (B) is chosen so that it can hold the total quantity of substances (a) and (b) and also allow the two substances (a) and (b) to be mixed, e.g., by shaking or stirring. Similarly, the mixture can also be prepared by completely transferring the substance (b) from container (B) into container (A), which already contains substance (a). In this case, the size of container (A) should be chosen so that it can hold the total quantity of substances (a) and (b) and also allow the two substances (a) and (b) to be mixed, e.g., by shaking or stirring. Another possibility for producing the application mixture is to completely transfer both agents (a) and (b) from the containers (A) and (B) into a third container (C), which then allows the mixing of both agents - e.g. by shaking or stirring. Example: A multi-component packaging unit according to the invention contains: - 25 g of the agent (a) in container (A) - 100 g of the agent (b) in container (B) To prepare the application mixture, the product (b) is completely transferred from container (B) to container (A). Products (a) and (b) are then shaken or stirred together. The mixing ratio of products (a) / (b) is (25 g / 100 g) = 0.25. Example: A multi-component packaging unit according to the invention contains: - 100 g of the agent (a) in container (A) - 100 g of the agent (b) in container (B) To prepare the application mixture, the product (b) is completely transferred from container (B) to container (A). Products (a) and (b) are then shaken or stirred together. The mixing ratio of products (a) / (b) is 1.0 (100 g / 100 g). The multi-component packaging unit according to the invention can additionally contain one or more further agents in further separately packaged containers. For example, the multi-component packaging unit according to the invention can also include a container (C) containing a cosmetic agent (c). The agent (c) can be, for example, a pre-treatment agent, a post-treatment agent, or a care agent. Proceedings The multi-component packaging units (kit-of-parts) according to the invention, as described above, can be used in reductive decolorization processes. A suitable method for the reductive decolorization of dyed keratin fibers comprises the following steps in the specified order: (I) Preparation of a ready-to-use decolorizing agent by mixing an agent (a) with an agent (b), wherein agent (a) is an agent as previously described in detail, and agent (b) is an agent as previously described in detail; (II) Application of the ready-to-use decolorizing agent to the dyed keratin fibers; (III) Allowing the decolorizing agent to act for a period of 5 to 60 minutes, preferably 10 to 55 minutes, more preferably 20 to 50 minutes, and particularly preferably 30 to 45 minutes; (IV) Rinsing the decolorizing agent off the keratin fibers; (V) Optionally, application of a post-treatment agent to the keratin fibers, wherein the post-treatment agent comprises at least one amphoterics,(VI) contains zwitterionic and / or anionic surfactant, (VI) optionally rinse off the post-treatment agent from the keratinous fibers. Steps (I), (II), (III), and (IV) of the procedure represent the decolorization process of the keratin fibers and are therefore carried out in direct succession. There is no time limit, in principle, for the sequence of steps (IV) and (V). Thus, step (V) can be performed hours, days, or, for example, up to two weeks after the completion of step (IV). It is also possible and in accordance with the invention if the decolorization steps (I) to (IV) are carried out several times in succession. As previously described, the agents (a) and (b) are preferably used in a ratio (a) / (b) which is preferably 1:5 to 5:1, more preferably 1:3 to 3:1 and particularly preferably 1:2 to 2:1. A method for decolorizing dyed keratinous fibers is therefore also preferred, which is characterized in that the production of the ready-to-use decolorizing agent in step (I) is carried out by mixing the agent (a) with the agent (b), wherein the two agents are used in a quantity ratio (a) / (b) of which the value is from 1:5 to 5:1, more preferably from 1:3 to 3:1 and particularly preferably from 1:2 to 2:1. The post-treatment agent that can be used optionally in process steps (V) and (VI) can be, for example, a shampoo, a conditioner, a gel or a solution. A post-treatment agent can be used, in particular, to prevent re-darkening or re-oxidation that can occur due to the action of atmospheric oxygen on the decolorized keratin fibers. To effectively prevent this re-oxidation, the post-treatment should take place before the atmospheric oxygen has time to act on the reduced keratin fibers. For this reason, the post-treatment should, if possible, be carried out directly after the decolorization (i.e., immediately after completion of process step (IV)). It is therefore preferred that there be a period of no more than 12 hours, preferably no more than 6 hours, more preferably no more than 1 hour, and most preferably no more than 30 minutes between the completion of process step (IV) and the start of process step (V). A preferred method according to the invention is thus characterized in that there is a period of at most 12 hours, preferably at most 6 hours, more preferably at most 1 hour and particularly preferably at most 30 minutes between the method steps (IV) and (V). The application of the after-treatment product can be repeated several times, for example, if the after-treatment product is a shampoo that is used regularly after bleaching. If the after-treatment, i.e., the execution of steps (V) to (VII), is repeated, it will be possible to suppress re-oxidation for a particularly long period of time. A particularly preferred method is therefore one for the reductive decolorization of dyed keratinous fibers, comprising the following steps in the specified order: (I) Preparation of a ready-to-use decolorizing agent by mixing an agent (a) with an agent (b), wherein the agent (a) is an agent as defined in the description of the first subject matter of the invention, and the agent (b) is an agent as defined in the description of the first subject matter of the invention; (II) Application of the ready-to-use decolorizing agent to dyed keratinous fibers; (III) Allowing the decolorizing agent to act for a period of 5 to 60 minutes, preferably 10 to 55 minutes, more preferably 20 to 50 minutes, and particularly preferably 30 to 45 minutes; (IV) Rinsing the decolorizing agent off the keratinous fibers; (V) Application of a post-treatment agent to the keratinous fibers.(VI) Rinsing the after-treatment agent from the keratin fibers, wherein the after-treatment agent contains at least one amphoteric, zwitterionic and / or anionic surfactant, (VII) Applying a after-treatment agent to the keratin fibers, wherein the after-treatment agent contains at least one amphoteric, zwitterionic and / or anionic surfactant, (VIII) Rinsing the after-treatment agent from the keratin fibers. To prevent reoxidation or darkening, the post-treatment agent applied in process step (V) preferably additionally contains at least one acid from the group consisting of citric acid, tartaric acid, malic acid, lactic acid, acetic acid, hydroxyethane-1,1-diphosphonic acid, methanesulfonic acid, benzoic acid, hydrochloric acid, sulfuric acid, phosphoric acid, malonic acid, maleic acid and / or oxalic acid. A particularly preferred method for the reductive decolorization of dyed keratinous fibers is therefore further characterized in that the post-treatment agent applied in step (V) contains at least one acid from the group consisting of citric acid, tartaric acid, malic acid, lactic acid, acetic acid, hydroxyethane-1,1-diphosphonic acid, methanesulfonic acid, malonic acid, maleic acid, fumaric acid, benzoic acid, hydrochloric acid, sulfuric acid, phosphoric acid, malonic acid, maleic acid and / or oxalic acid. In other words, a method for the reductive decolorization of dyed keratinous fibers is particularly preferred, comprising the following steps in the specified order: (I) Preparation of a ready-to-use decolorizing agent by mixing an agent (a) with an agent (b), wherein the agent (a) is an agent as defined in the description of the first subject matter of the invention, and the agent (b) is an agent as defined in the description of the first subject matter of the invention; (II) Application of the ready-to-use decolorizing agent to dyed keratinous fibers; (III) Allowing the decolorizing agent to act for a period of 5 to 60 minutes, preferably 10 to 55 minutes, more preferably 20 to 50 minutes, and particularly preferably 30 to 45 minutes; (IV) Rinsing the decolorizing agent off the keratinous fibers; (V) Application of a post-treatment agent to the keratinous fibers Fibers,wherein the after-treatment agent contains at least one acid from the group consisting of citric acid, tartaric acid, malic acid, lactic acid, acetic acid, hydroxyethane-1,1-diphosphonic acid, methanesulfonic acid, benzoic acid, hydrochloric acid, sulfuric acid, phosphoric acid, malonic acid, maleic acid and / or oxalic acid, and (VI) rinsing the after-treatment agent from the keratinous fibers. Regarding further preferred embodiments of the method according to the invention, what has been said about the means according to the invention applies mutatis mutandis. Examples 1.1. Coloring The following formulations were produced (all values ​​in wt.%): Dyeing cream (F1) Dyeing cream (F1) Cetearyl alcohol 8.5 C12-C18 Fatty Alcohols 3.0 Ceteareth-200.5 Ceteareth-120.5 Plantacare 1200 UP (Laurylglucosides, 50-53% aqueous solution)2.0 Sodium Laureth-6 Carboxylate (21% aqueous solution) 10.0 Sodium myreth sulfate (68-73% aqueous solution) 2.8 Sodium acrylate, trimethylammoniopropylacrylamide chloride copolymer (19-21% aqueous solution) 3.8 Potassium hydroxide 0.83 p-Toluenediamine sulfate 2,25 m-Aminophenol 0.075 2-Amino-3-hydroxypyridine 0.12 Resorcinol 0.62 4-Chlorresorcinol 0.26 3-Amino-2-methylamino-6-methoxypyridine0.04 1,3-Bis(2,4-diaminophenoxy)propane, tetrahydrochloride 0.05 Ammonium sulfate 0.1 Sodium sulfite 0.4 Ascorbic acid 0.1 1-Hydroxyethane-1,1-diphosphonic acid (60% aqueous solution) 0.2 Ammonia (25% aqueous solution) 7.2 WaterAd 100 Oxidizing agent (Ox) Oxidizing agent (Ox) Sodium benzoate 0.04 Dipicolinic acid 0.1 Disodium pyrophosphate 0.1 Potassium hydroxide 0.09 1,2-Propylene glycol 1.0 1-Hydroxyethane-1,1-diphosphonic acid (60% aqueous solution) 0.25 Paraffinum Liquidum 0.30 Steartrimonium chloride 0.39 Cetearyl alcohol3,4 Ceteareth-201.0 Hydrogen peroxide (50% aqueous solution) 12.0 The color cream (F1) and the oxidizing agent (Ox) were mixed in a 1:1 ratio and applied to strands of hair (Kerling Euronaturhaar white). The weight ratio of application mixture to hair was 4:1, and the processing time was 30 minutes at a temperature of 32 degrees Celsius. The strands were then rinsed with water, dried, and left to rest at room temperature for at least 24 hours. The strands were colored a dark brown shade. The hair was colorimetrically measured, and the L-value was determined. 1.2. Discoloration The following decolorizing agents were prepared (all values ​​in wt% active substance): Agent (a) Agent (a) Versagel M 1600 (1)7,67,6 Lanette N (2)10,810,8 Ceteareth-20 (C16-C18 fatty alcohol,ethoxylated with 20 EO)0,90,9 Ceteareth-50 (C16-C18 fatty alcohol,ethoxylated with 50 EO)5,05,0 Formamidinsulfinsäure-10,0 Natriumdithionit10,0- Paraffinium Liquidumad 100ad 100 (1) INCl: Paraffinium Liquidum (Mineral Oil), Ethylen / Propylen / Styren-Copolymer, Butylen / Ethylen / Styren-Copolymer (2) INCl: Cetearyl alcohol (ca. 90 %) and Sodium Cetearyl Sulfate (ca 10.0 %) Mittel (b) Mittel (b) Natrosol 250 HR (Hydroxyethylcellulose)-2,0 Monoethanolamin1,01,0 Emulgade F (3)3,0- Wasser (dest.)ad 100ad 100 (3) CETEARYL ALCOHOL, PEG-40 CASTOR OIL, SODIUM CETEARYL SULFATE Agents (aV) and (b1) were mixed together in a ratio (aV) / (b1) of 1:1 (i.e., 100 g of agent (aV) and 100 g of agent (b1)). Both agents could be mixed together without dust formation. Agents (aE) and (b1) were mixed together in a ratio (aE) / (b1) of 1:1 (i.e., 100 g of agent (aE) and 100 g of agent (b1)). Both agents could be mixed together without dust formation. The ready-to-use color removers prepared in this way were applied to the hair colored according to point 1.1 and left to act for 30 minutes at a temperature of 20 °C. Afterwards, the strands were rinsed with water for 20 seconds and dried. The hair was measured again using colorimetric methods, and the L-value was determined. To determine the bleaching effect, the ΔL value was calculated using the following formula. Within the Lab color space, the L-axis describes the brightness of a color (L = 0 means black, L = 100 means white). The larger the ΔL value, the greater the difference in brightness of the color and the more effectively the hair is bleached. The higher the ΔL value, the more effective the bleaching agent. (aV) + (b1)24,734,39,6 (aE) + (b1)24,742,718,0 Similarly, agents (aV) and (b2) were mixed together in a ratio (aV) / (b2) of 1:1 (i.e., 100 g of agent (aV) and 100 g of agent (b2)) and applied. Both agents mixed without dust formation. Decolorization was carried out as described above. Similarly, agents (aE) and (b2) were mixed together in a ratio (aE) / (b2) of 1:1 (i.e., 100 g of agent (aE) and 100 g of agent (b2)) and applied. Both agents mixed without dust formation. The decolorization was carried out as described above. (aV) + (b2)24,533,08,5 (aE) + (b2)24,543,118,6

Claims

A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinous fibers, which is packaged separately, comprises: a container (A) containing a cosmetic agent (a) and a container (B) containing a cosmetic agent (b), wherein the agent (a) in container (A)(a1) comprises one or more sulfinic acid derivatives from the group consisting of: (H2N)(NH)C(SO2H) formamidine sulfinic acid, HN(CH2SO2Na)2, disodium [(sulfinatomethyl)amino]methanesulfinate, HN(CH2SO2K)2, dipotassium [(sulfinatomethyl)amino]methanesulfinate, HN(CH2SO2H)2, [(sulfinomethyl)amino]methanesulfinic acid, N(CH2SO2Na)3, trisodium [bis(sulfinatomethyl)amino]methanesulfinate- N(CH2SO2K)3, tripotassium [bis(sulfinatomethyl)amino]methanesulfinate- N(CH2SO2H)3, [bis(sulfinomethyl)amino]methanesulfinic acid- H2NCH(CH3)SO2Na, sodium 1-aminoethane-1-sulfinate- H2NCH(CH3)SO2K, potassium 1-aminoethane-1-sulfinate- H2NCH(CH3)SO2H, 1-aminoethane-1-sulfinic acid,- HN(CH(CH3)SO2Na)2,Disodium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate- HN(CH(CH3)SO2K)2, Dipotassium 1-[(1-sulfinatoethyl)amino]ethane-1-sulfinate- HN(CH(CH3)SO2H)2, 1-[(1-sulfinoethyl)amino]ethane-1-sulfinic acid- N(CH(CH3)SO2Na)3, Trisodium 1-[bis(1-sulfinatoethyl)amino]ethane-1-sulfinate- N(CH(CH3)SO2K)3, Tripotassium 1-[bis(1-sulfinatoethyl)amino]ethane-1-sulfinate and / or- N(CH(CH3)SO2H)3, 1-[bis(1-sulfinoethyl)amino]ethane-1-sulfinic acid contains,(a2) one or more fatty components from the group of C12-C30 fatty alcohols, C12-C30 fatty acid triglycerides, C12-C30 fatty acid monoglycerides, C12-C30 fatty acid diglycerides, C12-C30 fatty acid esters, hydrocarbons and / or silicone oils,(a3) has a water content of not more than 10.0% by weight - based on the total weight of the product (a),- the product (b) in container (B)(b1) has a water content of at least 30.0% by weight - based on the total weight of the product (b),(b2) contains one or more alkalizing agents from the group consisting of ammonia, alkanolamines and / or basic amino acids, and (b3) has a pH of 7.5 to 12.

5. Multi-component packaging unit (kit-of-parts) according to claim 1, characterized in that the agent (a) in container (A)(a1) contains formamidine sulfinic acid as a sulfinic acid derivative (H2N)(NH)C(SO2H). Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 2, characterized in that the agent (a) in container (A) - based on the total weight of the agent (a) - contains one or more sulfinic acid derivatives from group (a1) in a total amount of 0.1 to 50.0 wt.%, preferably 1.0 to 30.0 wt.%, more preferably 1.5 to 20.0 wt.% and particularly preferably 2.5 to 10.5 wt.%. Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 3, characterized in that the agent (a) in container (A) - based on the total weight of the agent (a) - contains one or more fat components from group (a2) in a total amount of 10.0 to 90.0 wt.%, preferably 20.0 to 86.0 wt.%, more preferably 25.0 to 84.0 wt.% and particularly preferably 30.0 to 80.0 wt.%. Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 4, characterized in that the agent (a) in container (A)(a2) contains one or more hydrocarbons in a total amount of 15.0 to 90.0 wt.%, preferably 20.0 to 85.0 wt.%, more preferably 25.0 to 80.0 wt.% and particularly preferably 30.0 to 75.0 wt.% - based on the total weight of the agent (a). Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 5, characterized in that the agent (a) in container (A)(a3) has a water content of at most 8.0 wt.%, preferably at most 5.0 wt.%, more preferably at most 3.0 wt.% and particularly preferably at most 1.0 wt.% - based on the total weight of the agent (a). Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 6, characterized in that the agent (a) in container (A) additionally contains (a4) one or more non-ionic surfactants in a total amount of 0.1 to 15.0 wt.%, preferably 0.5 to 12.5 wt.%, more preferably 1.0 to 10.0 wt.% and particularly preferably 1.5 to 8.0 wt.% - based on the total weight of the agent (a). Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 7, characterized in that the agent (a) in container (A) additionally (a5) contains one or more non-ionic polymers in a total amount of 0.1 to 15.0 wt.%, preferably 0.2 to 10.5 wt.%, more preferably 0.25 to 7.5 wt.% and particularly preferably 0.3 to 5.0 wt.% - based on the total weight of the agent (a). Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 7, characterized in that the agent (b) in container (B)(b1) has a water content of at least 40.0 wt.%, preferably at least 50.0 wt.%, further preferably at least 55.0 wt.% and most preferably at least 60.0 wt.% - based on the total weight of the agent (b).