Improved decolorization of dyed keratinous fibers

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 solid or powdered cosmetic agent (a) and a container (B) containing an aqueous cosmetic agent (b), wherein 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 60.0 to 100.0 wt.%, (a1) wherein one or more sulfinic acid derivatives are selected from the group consisting of: (H2N)(NH)C(SO2H) formamidine sulfinic acid, HN(CH2SO2Na)2, disodium [(sulfinatomethyl)amino]methanesulfinate, and 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, and- the agent (b) in container (B) has a pH value in the range of 7.5 to 12.0, and- the total content of all metal salts contained in the agent (a) from the group consisting of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the agent (a) - is below 0.1 wt%,and- the total content of all metal salts contained in the average (b) from the group of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the average (b) - is below 0.1 wt.%.

Description

The present invention lies in the field of cosmetics and relates to multi-component packaging units (kit-of-parts) for the reductive decolorization of dyed keratinous fibers, which comprise containers (A) and (B) assembled separately. Container (A) contains a cosmetic agent (a) in solid or powder form, comprising at least one sulfinic acid derivative from a specific group as a reducing agent in a total amount of 60.0 to 100.0 wt.%. Container (B) contains an aqueous cosmetic agent (b) acting as a carrier and has a pH value in the range of 7.5 to 12.0. These two agents (a) and (b) are intended for use in processes for the reductive color removal of dyed keratinous fibers, particularly human hair. For the purpose of reductive color removal, the solid or powdered agent (a), which contains the sulfinic acid derivative, is mixed with the aqueous cosmetic carrier (b). During mixing, the solid or powdered agent (a) dissolves. The application mixture prepared in this way is applied to dyed keratinous fibers, left on the keratin fibers for an application period of 2 to 60 minutes, and then rinsed off. 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 representatives of this class of dyes include, for example, triphenylmethane dyes, azo dyes, anthraquinone dyes or nitrobenzene dyes, each of which can bear 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. Methods and techniques for color removal are already known in the literature. One method, well-established in the art, for reversing colorations is the oxidative decolorization of the 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 already 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. Publication WO 2013 / 017862 A2 describes a process for the reductive decolorization of oxidatively dyed hair, whereby thiourea dioxide, which is also alternatively referred to as formamidine sulfinic acid, can be used as a reducing agent. 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. A general problem with reductive color removers known from the prior art is that while the colored keratin fibers can initially be decolorized by the reducing agent, the color removal is not permanent. This is particularly true for oxidatively colored hair, where the color is produced on the hair by oxidation dye precursors of the developer and coupler type, resulting in colorations with sometimes very good colorfastness properties. When using a reductive color remover, these dyes are reductively converted into uncolored compounds – which, due to similarly good colorfastness properties, still remain on the hair. After rinsing off the reducing agent and exposure to atmospheric oxygen, these reduced forms can gradually be re-oxidized. This re-oxidation results in a more or less pronounced recoloration. This recoloration generally does not correspond to the shade in which the keratin fibers were previously dyed, but can be arbitrarily unattractive and is therefore all the more undesirable for the user of the decolorizing agent. For this reason, the search continues for reductive dye removal agents in which the aforementioned recoloration does not occur. Sulfur-containing compounds such as cysteine ​​or dithionite salts are typically used as reducing agents, but these emit a strong sulfurous odor during application, causing significant odor nuisance for the user. Therefore, the search for agents with lower odor emissions continues. The object of the present invention was therefore to provide a decolorizing agent for removing the color of dyed keratin fibers, which would remove the color from the dyed keratin fibers as completely as possible. The decolorization should be long-lasting, and the decolorized keratin fibers should not recolor, change in shade, or darken upon exposure to atmospheric oxygen. The decolorizing agent should exhibit particularly good decolorizing performance on keratin fibers that have been previously dyed with oxidative dyes based on developer and coupler-type oxidation dye precursors. In particular, the odor nuisance caused by the dyes should be minimized or even eliminated. Surprisingly, it has now been found that the odor development occurring during the application of the reductive decolorizing agent can be almost completely suppressed when a multi-component packaging unit comprising two different agents (a) and (b) is used for the purpose of color removal. Agent (a) is in solid or powder form and contains at least one reducing agent from a group of certain sulfinic acids (a1) in a total amount of 60.0 to 100.0 wt.%, and agent (b) is an aqueous carrier formulation with a pH value in the range of 7.5 to 12.0. It was found that both the solid / powdered agent (a) and the application mixture produced by mixing agents (a) and (b) develop virtually no odor. 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 and comprises: - a container (A) containing a solid or powdered cosmetic agent (a) and - a container (B) containing an aqueous cosmetic agent (b), wherein - the agent (a) in container (A) contains - based on the total weight of the agent (a) - one or more sulfinic acid derivatives from the group (a1) in a total amount of 60.0 to 100.0 wt.%, (a1) wherein one or more sulfinic acid derivatives are 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, and- the agent (b) in container (B) has a pH value in the range of 7.5 to 12.0, and- the total content of all metal salts contained in the agent (a) from the group of magnesium salts, zinc salts, iron salts,the copper salts and the calcium salts - based on the total weight of the product (a) - is below 0.1 wt.%, and - the total content of all metal salts contained in the product (b) from the group of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the product (b) - is below 0.1 wt.%. The multi-component packaging unit according to the invention comprises separately packaged containers (A) and (B), each containing the agents (a) and (b). Agent (a) is in solid or powder form and contains at least one reducing agent from the group of sulfinic acids (a1). Agent (b) is an aqueous carrier formulation. The ready-to-use decolorizing agent is produced by mixing the two agents (a) and (b) – i.e., by mixing the reducing agent-containing agent (a) with the carrier (b). 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 agent (a) is supplied in solid form or as a powder and is therefore essentially anhydrous. Furthermore, the agent (a) is also solvent-free or contains solvents only in very small quantities. The agent (b) is an aqueous cosmetic carrier. This could be, for example, a suitable aqueous or aqueous-alcoholic carrier. For the purpose of reductive decolorization, such carriers could 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. Creams or emulsions are particularly preferred for agents used for the reductive removal of color from keratinous fibers. Means (a) in container (A) The multi-component packaging unit (kit-of-parts) according to the invention comprises a first separately assembled container (A) with a solid or powdered cosmetic agent (a). A solid agent within the meaning of the present invention is understood to be an agent (a) which has a melting point of at least 25 °C, i.e. the agent (a) is solid at room temperature. A solid means (a) within the meaning of the invention is in particular to be understood as a means which is in the form of a shaped body, for example in the form of a tablet or one or more pellets. To produce this shaped body, either the agent (a) (or the fusible parts of the agent (a)) can be heated above its melting point, poured into a mold, and then cooled. Alternatively, it is also possible to compress a powdered agent (a) into a shaped body. Furthermore, the agent (a) can also be in powder form. Powders made from solid components with different particle sizes can be used. However, it is usually preferred if the powders have a particle size that is as homogeneous as possible, particularly to facilitate uniform dispersion or dissolution of the powders in the agent (b). A powder is a mixture consisting of small, solid particles. Preferably, the powdered agent (a) has a mean particle diameter of at least 20 µm and a BET surface area of ​​40 to 400 m² / g (determined according to DIN 66131 with nitrogen). If the agent (a) is in powder form, then the powder or powder mixture also has a melting point of at least 25 °C. An essential feature of the solid or powdered agent (a) according to the invention is its content of one or more sulfinic acid derivatives (a1) 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, 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 a melting point of 100 °C, 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. The odor development of the kit-of-parts according to the invention is determined both by the sulfinic acids (a1) contained in the medium (a) and by the other ingredients present in the aqueous cosmetic carrier (b). A particularly good decolorizing effect with at the same time particularly low odor development could be achieved with formamidine sulfinic acid, therefore the use of formamidine sulfinic acid in the solid / powdered agents (a) is particularly preferred. A particularly preferred multi-component packaging unit (kit-of-parts) is characterized in that the agent (a) in container (A)(a1) contains formamidine sulfinic acid as a sulfinic acid derivative (H2N)(NH)C(SO2H). The sulfinic acid(s) from group (a1) are used in specific quantity ranges in the compound (a). To achieve optimal decolorizing effect, the decolorizing agent contains the sulfinic acid derivative(s) (a1) in a total amount of 60.0 to 100.0 wt.%, preferably 70.0 to 100.0 wt.%, more preferably 80.0 to 100.0 wt.%, and particularly preferably 90.0 to 100.0 wt.%. All quantities mentioned here refer to the total weight of all sulfinic acid derivatives from group (a1) contained in the compound (a), which is expressed as a percentage of the total weight of the compound (a). A multi-component packaging unit (kit-of-parts) according to the invention is further 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 the group (a1) in a total amount of 60.0 to 100.0 wt.%, preferably 70.0 to 100.0 wt.%, more preferably 80.0 to 100.0 wt.% and particularly preferably 90.0 to 100.0 wt.%. Another particularly preferred multi-component packaging unit (kit-of-parts) is characterized in that the agent (a) in container (A) contains 60.0 to 100.0 wt.% formamidine sulfinic acid (a1) based on the total weight of the agent (a). Another particularly preferred multi-component packaging unit (kit-of-parts) is characterized in that the agent (a) in container (A) contains 70.0 to 100.0 wt.% formamidine sulfinic acid based on the total weight of the agent (a). Another particularly preferred multi-component packaging unit (kit-of-parts) is characterized in that the agent (a) in container (A) contains 80.0 to 100.0 wt.% wt.% formamidine sulfinic acid based on the total weight of the agent (a). Another particularly preferred multi-component packaging unit (kit-of-parts) is characterized in that the agent (a) in container (A) contains 90.0 to 100.0 wt.% formamidine sulfinic acid based on the total weight of the agent (a). Users who wish to remove dye from their hair apply a reductive bleaching agent to hair that has already undergone a hair coloring process. In the case of an oxidative dye, the hair was already oxidatively damaged before bleaching, and the reductive bleaching process can cause further damage. A key objective is therefore to achieve the most complete bleaching possible with minimal damage to the keratin fibers. It is known from the prior art that the use of metal salts can potentially have a positive effect on the decolorizing effect, but is also associated with the disadvantage of disproportionately significant hair damage. Keratin fibers decolorized using a metal salt were extremely brittle and fragile. Furthermore, interactions with the reductively altered dyes were observed when metal salts were used; that is, color shifts and, in some cases, accelerated darkening were observed. For this reason, it is essential to the invention that both agent (a) and agent (b) are free of divalent and trivalent metal salts. For this reason, the total content of all metal salts contained in average (a) from the groups of magnesium salts, zinc salts, iron salts, copper salts, and calcium salts is below 0.1 wt.%. The weight value of 0.1 wt.% refers to the total amount of all metal salts contained in average (a) from the groups of magnesium salts, zinc salts, iron salts, copper salts, and calcium salts, which is expressed as a percentage of the total weight of average (a). In average (b), the total content of all metal salts from the groups of magnesium salts, zinc salts, iron salts, copper salts, and calcium salts is also below 0.1 wt.%. The weight value of 0.1 wt.% refers here again to the total amount of all metal salts contained in average (b) from the groups of magnesium salts, zinc salts, iron salts, copper salts, and calcium salts, which is expressed as a percentage of the total weight of average (b). Examples of magnesium salts are MgCl₂, MgBr₂, Mg(OH)₂, Mg(CO₃), and Mg(OAc)₂. Examples of zinc salts are ZnCl₂, ZnBr₂, Zn(OH)₂, and Zn(OAc)₂. Examples of iron salts are FeCl₂, FeBr₂, Fe(OH)₂, Fe(CO₃), FeCl₃, FeBr₃, Fe(OH)₃, and Fe₂(CO₃)₂. Examples of copper salts are CuCl, CuBr, Cu(OH), CuCl₂, CuBr₂, Cu(OH)₂, and Cu(OAc)₂. Examples of calcium salts are CaCl₂, CaBr₂, Ca(OH)₂, Ca(CO₃), and Ca(OAc)₂. Other divalent and trivalent metal salts are also preferably not included in agents (a) and (b). In a further preferred embodiment, a kit-of-parts according to the invention is therefore characterized in that the agent (a) is essentially free of divalent and trivalent metal salts and the agent (b) is essentially free of divalent and trivalent metal salts. For the purposes of the present invention, divalent and trivalent metal salts are understood to be all divalent and trivalent salts of metals from subgroups 3 to 12, as well as main groups 3 and 4 – these are in particular: salts of metals of subgroup 4: Ti, Zr, Hf; salts of metals of subgroup 5: V, Nb, Ta; salts of metals of subgroup 6: Cr, Mo, W; salts of metals of subgroup 7: Mn; salts of metals of subgroup 8: Fe, Ru, Os; salts of metals of subgroup 9: Co, Rh, Ir; salts of metals of subgroup 10: Ni, Pd, Pt; salts of metals of subgroup 11: Cu, Ag, Au; salts of metals of subgroup 12: Zn; salts of metals of main group 3: Al, Ga, In, Ti; salts of metals of main group 4: Ge, Sn, Pb (silicon compounds are not considered metal salts within the meaning of the invention) Salts of metals of the 5th main group: As, Sb, Bi Divalent metal salts are defined as salts of a doubly positively charged metal cation. Trivalent metal salts are defined as salts of a triply positively charged metal cation. In particular, the presence of TiO₂, MnCl₂, MnCl₃, Mn(OH)₂, Mn(OH)₃, AlCl₃, and Al(OH)₃ has proven to be disadvantageous in this context. The term “essentially free from” means that certain raw materials may contain metal salts as by-products in small quantities, but that the deliberate addition of the metal salts to products (a) and (b) is avoided. Particularly preferred is the total content of all metal salts contained in the average (a) from the group of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the average (a) - a value below 0.01 wt%. Particularly preferred is the total content of all metal salts contained in the average (b) from the group of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the average (b) - at a value below 0.01 wt.%. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that: - the total content of all metal salts contained in the compound (a) from the group consisting of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the compound (a) - is below 0.01 wt% and - the total content of all metal salts contained in the compound (b) from the group consisting of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the compound (b) - is below 0.01 wt%. When the solid or powdered agent (a) is mixed with the aqueous carrier agent (b), rapid and lump-free dissolution of the agent (a) is advantageous for achieving a uniform decolorization result. For this reason, the agent (a) according to the invention may preferably contain at least one dissolution accelerator. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (a) in container (A) additionally contains (a2) one or more dissolution accelerators. The term dissolution accelerator includes gas-evolving components, preformed and enclosed gases, explosives and their mixtures. In a preferred embodiment of the present invention, gas-generating components are used as dissolution accelerators. These components react with each other upon contact with water, generating in-situ gases that create pressure within the tablet, causing it to disintegrate into smaller particles. An example of such a system is a specific combination of suitable acids with bases. Mono-, di-, or trivalent acids with a pKa value of 1.0 to 6.9 are preferred. Preferred acids include citric acid, malic acid, maleic acid, malonic acid, itaconic acid, tartaric acid, oxalic acid, glutaric acid, glutamic acid, lactic acid, fumaric acid, glycolic acid, and mixtures thereof. Citric acid is particularly preferred. It is especially preferred to use the citric acid in particle form, wherein the particles have a diameter of less than 1000 µm, particularly less than 700 µm, and most preferably less than 400 µm.Other suitable alternative acids are the homopolymers or copolymers of acrylic acid, maleic acid, methacrylic acid, or itaconic acid with a molecular weight of 2,000 to 200,000. Homopolymers of acrylic acid and copolymers of acrylic acid and maleic acid are particularly preferred. Preferred bases according to the invention are alkali metal silicates, carbonates, hydrogen carbonates, and mixtures thereof. Metasilicates, hydrogen carbonates, and carbonates are particularly preferred; hydrogen carbonates are especially preferred. Particle-shaped hydrogen carbonates with a particle diameter of less than 1,000 µm, particularly less than 700 µm, and most preferably less than 400 µm, are particularly preferred. Sodium or potassium salts of the aforementioned bases are particularly preferred. These gas-evolving components are preferably present in the composition (a) according to the invention in an amount of at least 10 wt.%, particularly at least 20 wt.%. In a further preferred embodiment of the present invention, the gas is preformed or enclosed in the medium (a) so that gas evolution begins when the dissolution of the molded body starts and accelerates further dissolution. Examples of suitable gases are air, carbon dioxide, N₂O, oxygen and / or other non-toxic, non-flammable gases. In a particularly preferred embodiment of the present invention, disintegration aids, so-called molded body disintegrants, are incorporated into the molded bodies as dissolution accelerators to shorten the disintegration times. According to Römpp (9th edition, Vol. 6, p. 4440) and Voigt, "Textbook of Pharmaceutical Technology" (6th edition, 1987, pp. 182-184), molded body disintegrants or disintegration accelerators are understood to be excipients that ensure the rapid disintegration of molded bodies in water or gastric juice and the release of the pharmaceuticals in an absorbable form. These substances, also known as "explosives" due to their effect, increase in volume (swell) upon contact with water. Examples of swelling disintegration aids include synthetic polymers such as polyvinylpyrrolidone (PVP) or natural polymers or modified natural substances such as cellulose and starch and their derivatives, alginates, or casein derivatives. Preferred disintegration agents used in the present invention are cellulose-based disintegration agents, such that preferred molded parts contain such a cellulose-based disintegration agent in amounts of 0.5 to 50 wt.%, preferably 3 to 30 wt.%, based on the total molded part. Pure cellulose has the formal gross composition (C6H10O5)n and formally represents a β-1,4-polyacetal of cellobiose, which in turn is composed of two glucose molecules. Suitable celluloses consist of approximately 500 to 5000 glucose units and consequently have average molar masses of 50,000 to 500,000. Cellulose derivatives obtainable from cellulose by polymer-analogous reactions can also be used as cellulose-based disintegration agents in the present invention. Such chemically modified celluloses include, for example, products from esterifications or...Etherifications in which hydroxy hydrogen atoms have been substituted. Celluloses in which the hydroxy groups have been replaced by functional groups not bound via an oxygen atom can also be used as cellulose derivatives. Examples of cellulose derivatives include alkali celluloses, carboxymethyl cellulose (CMC), cellulose esters and ethers, and aminocelluloses. These cellulose derivatives are preferably not used as the sole cellulose-based disintegrating agent, but rather in mixtures with cellulose. The cellulose derivative content of these mixtures is preferably below 50 wt%, and particularly preferably below 20 wt%, based on the cellulose-based disintegrating agent. Pure cellulose, free of cellulose derivatives, is particularly preferably used as the cellulose-based disintegrating agent. According to the invention, the cellulose used as a disintegration aid cannot be used in finely divided form, but is converted into a coarser form before being added to the premixes to be pressed, for example by granulation or compaction. The particle sizes of such disintegration aids are mostly above 200 µm, preferably at least 90 wt.% between 300 and 1600 µm, and particularly at least 90 wt.% between 400 and 1200 µm. The disintegration aids according to the invention are commercially available, for example, under the name Arbocel® from the company Rettenmaier. A preferred disintegration aid is, for example, Arbocel® TF-30-HG. Microcrystalline cellulose is used as a preferred cellulose-based disintegration agent or as a component thereof. This microcrystalline cellulose is obtained by partial hydrolysis of celluloses under conditions that attack and completely dissolve only the amorphous regions (approximately 30% of the total cellulose mass) of the celluloses, while leaving the crystalline regions (approximately 70%) intact. Subsequent disaggregation of the microfine celluloses produced by the hydrolysis yields the microcrystalline celluloses, which have primary particle sizes of approximately 5 µm and can be compacted, for example, into granules with an average particle size of 200 µm. Suitable microcrystalline cellulose is commercially available, for example, under the trade name Avicel®. According to the invention, the accelerated dissolution of the solid means (a) can also be achieved by pre-granulation of the other components of the molded body. In a preferred embodiment of the molded bodies according to the invention, these contain, in particular in addition to at least one cellulose-based explosive, a mixture of starch and at least one saccharide to accelerate dissolution. Disaccharides are preferred saccharides used in this embodiment. The mixture preferably exists in the molded body in a weight ratio of starch to the saccharides used of 10:1 to 1:10, particularly preferably of 1:1 to 1:10, and most preferably of 1:4 to 1:8. The disaccharides used are preferably selected from lactose, maltose, sucrose, trehalose, turanose, gentiobiose, melibiose, and cellobiose. Lactose, maltose, and sucrose are particularly preferred, and lactose is especially preferred, in the molded bodies according to the invention. The starch-saccharide mixture is contained in the molded body in an amount of 5 to 60 wt.%, preferably 20 to 40 wt.% based on the mass of the entire molded body. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (a) in container (A) additionally contains (a2) one or more dissolution accelerators from the group consisting of homopolymers of (meth)acrylic acid, copolymers of (meth)acrylic acid, polyvinylpyrrolidone (PVP), celluloses, cellulose derivatives, starch, starch derivatives, alginates and / or casein derivatives. Furthermore, the agent (a) – particularly when it is in powder form – may preferably contain one or more flow agents. Particulate silicon dioxide is an example of a suitable flow agent. The use of the flow agent can prevent or minimize clumping of the powder caused by moisture. It is particularly preferred if the particulate silicon dioxide has a mean particle diameter of at least 40 µm, and most preferably at least 100 µm. It is preferred if the particulate silicon dioxide has a maximum mean particle diameter of 500 µm. Furthermore, according to the invention, it is advantageous if the particulate silicon dioxide has pores, in particular meso- and / or macropores. The volume of these pores preferably occupies 10 to 80% of the volume of a silicon dioxide particle. It is particularly preferred if the sum of the volumes of those pores with a diameter of less than 5 nm does not exceed 5% of the total pore volume. It is preferred if the particulate silicon dioxide has a pore volume of 0.5 to 3.0 mL / g. Examples of silicon dioxide that can be used according to the invention are described in the two publications WO-03 / 037287 and EP-A1-725 037, to which explicit and full reference is made here. It is particularly preferred to adjust the amount of particulate silicon dioxide used to the amount of sulfinic acids (a1) contained in the average (a). Preferably, 0.5 to 4.0 wt.%, based on the weight of the agent (a), of particulate silicon dioxide is used in the agent (a). Particulate silicon dioxide that can be used according to the invention is, for example, marketed by the company Evonik under the trade name Aerosil 200. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (a) in container (A) additionally contains (a3) ​​particulate silicon dioxide as a flow aid. Another particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (a) in container (A) additionally contains (a3) ​​as a flow aid particulate silicon dioxide with a mean particle diameter of at least 20 µm and a BET surface area of ​​40 to 400 m2 / g (determined according to DIN 66131 with nitrogen). As previously described, a composition (a) according to the invention contains at least one sulfinic acid derivative of group (a1). The sulfinic acid derivatives from this group are characterized by minimal odor development during their use. With a view to optimally solving the problem set out in the invention, it has also proven particularly advantageous to avoid the use of other, odor-intensive reducing agents. For this reason, it is particularly preferred if the composition (a) is essentially free of further reducing agents from the group consisting of sodium sulfite, sodium hydrogen sulfite, potassium sulfite, potassium hydrogen sulfite, ammonium sulfite, hydroxymethanesulfinic acid, aminomethanesulfinic acid, cysteine, thiolactic acid, and thioglycolic acid. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that - based on the total weight of the agent (a) -- the total content of all reducing agents contained in the agent (a) from the group consisting of sodium sulfite, sodium hydrogen sulfite, potassium sulfite, potassium hydrogen sulfite, ammonium sulfite, hydroxymethanesulfinic acid, aminomethanesulfinic acid, cysteine, thiolactic acid, thioglycolic acid and all physiologically acceptable salts of these compounds is below 0.5 wt.%, preferably below 0.1 wt.% and particularly preferably below 0.05 wt.%. The quantities given refer to the total weight of all compounds contained in the average (a) from the group consisting of sodium sulfite, sodium hydrogen sulfite, potassium sulfite, potassium hydrogen sulfite, ammonium sulfite, hydroxymethanesulfinic acid, aminomethanesulfinic acid, cysteine, thiolactic acid, thioglycolic acid and all physiologically acceptable salts of these compounds, which is related to the total weight of the average (a). Means (b) in container (B) The multi-component packaging unit according to the invention comprises a second separately packaged container (B) which contains an aqueous agent (b). This agent (b) is a cosmetic carrier formulation which can be aqueous or aqueous-alcoholic. Preferably, the agent (b) has a water content of at least 60.0 wt.%, more preferably at least 70.0 wt.%, more preferably at least 80.0 wt.% and most preferably at least 90.0 wt.%. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (b) in container (B) - based on the total weight of the agent (b) -(b1) has a water content of at least 60.0 wt.%, preferably at least 70.0 wt.%, more preferably at least 80.0 wt.% and most preferably at least 90.0 wt.%. Various reducing agents reach their optimum efficiency within a specific pH range. Ready-to-use decolorizing agents containing sulfinic acid derivatives of group (a1) are most effective in alkaline conditions. The ready-to-use decolorizing agent is prepared – as previously described – shortly before use by mixing agents (a) and (b). The ready-to-use decolorizing agent therefore preferably contains at least one alkalizing agent. For reasons of stability and storage, it is preferred to incorporate the alkalizing agent(s) into the cosmetic carrier (b). Rapid dissolution of the agent (a) and very good decolorizing effect could be observed when the agent (b) in container (B) was adjusted to a pH in the range of 7.5 to 12.0, preferably 8.0 to 11.5, more preferably 8.5 to 11.0 and particularly preferably 9.0 to 10.5. A multi-component packaging unit (kit-of-parts) according to the invention is further characterized in that the agent (b) in container (B) has a pH value in the range of 7.5 to 12.0, preferably 8.0 to 11.5, more preferably 8.5 to 11.0 and particularly preferably 9.0 to 10.5. All pH values ​​of the present invention were measured using a Schott N 61 type glass electrode at a temperature of 22 °C. For example, basic amino acids such as arginine, lysine, ornithine and / or histidine can be used as alkalizing agents in the cosmetic carrier (b). Other suitable alkalizing agents are inorganic alkalizing agents from the group containing sodium hydroxide, potassium hydroxide, sodium carbonate, sodium hydrogen carbonate, potassium carbonate and / or potassium hydrogen carbonate. Nitrogen-containing alkalizing agents from the group of alkanolamines have proven suitable in this context. Particularly preferred alkanolamines can be selected, for example, 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 / or 2-amino-2-methylpropan-1,3-diol. In principle, ammonia can also be used as an alkalizing agent. However, to avoid any odor development, it is particularly advantageous to refrain from using even strongly odorous alkalizing agents such as ammonia. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (b) additionally contains at least one alkalizing agent from the group consisting of monoethanolamine, triethanolamine, 2-amino-2-methyl-propanol, arginine, lysine and / or histidine. With a view to optimally solving the problem set out in the invention, it has proven particularly advantageous to avoid the use of other, odor-intensive reducing agents. For this reason, it is also particularly preferred if the agent (b) is essentially free of further reducing agents from the group consisting of sodium sulfite, sodium hydrogen sulfite, potassium sulfite, potassium hydrogen sulfite, ammonium sulfite, hydroxymethanesulfinic acid, aminomethanesulfinic acid, cysteine, thiolactic acid, and thioglycolic acid. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that - based on the total weight of the agent (b) -- the total content of all reducing agents contained in the agent (b) from the group consisting of sodium sulfite, sodium hydrogen sulfite, potassium sulfite, potassium hydrogen sulfite, ammonium sulfite, hydroxymethanesulfinic acid, aminomethanesulfinic acid, cysteine, thiolactic acid, thioglycolic acid and all physiologically acceptable salts of these compounds is below 0.5 wt.%, preferably below 0.1 wt.% and particularly preferably below 0.05 wt.%. The quantities stated here refer to the total weight of all compounds contained in the average (b) from the group consisting of sodium sulfite, sodium hydrogen sulfite, potassium sulfite, potassium hydrogen sulfite, ammonium sulfite, hydroxymethanesulfinic acid, aminomethanesulfinic acid, cysteine, thiolactic acid, thioglycolic acid and all physiologically acceptable salts of these compounds, which is related to the total weight of the average (b). The agent (b) is provided as a liquid preparation to which further surfactants may be added. These are preferably selected from anionic, zwitterionic, amphoteric and nonionic surfactants and emulsifiers. 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. Furthermore, it has proven advantageous if the composition (b) contains additional nonionic surfactants. Preferred nonionic surfactants are alkyl polyglycosides and alkylene oxide adsorption products to fatty alcohols, fatty acids, and fatty acid glycerides, each containing 2 to 50 moles of ethylene oxide per mole of fatty alcohol or fatty acid. Preparations with excellent properties are also obtained when they contain fatty acid esters of ethoxylated glycerol as nonionic surfactants. It is particularly preferred if the composition (b) contains an ethoxylated castor oil with 2 to 50 moles of ethylene oxide per mole of fatty acid or an ethoxylated, hydrogenated castor oil with 2 to 50 moles of ethylene oxide per mole of fatty acid as a nonionic surfactant. The use of PEG-40 castor oil is particularly preferred in this context. The non-ionic, zwitterionic or amphoteric surfactants are used in proportions of 0.1 to 15.0 wt.%, preferably 0.5 to 10.0 wt.% and most preferably 0.7 to 5.0 wt.%, based on the total amount of the agent. It is particularly preferred if the agent (b) contains at least one anionic surfactant. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (b) in container (B) additionally contains at least one anionic surfactant. A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (b) in container (B) additionally contains at least one anionic surfactant from the group of C8-C30 fatty acids, C8-C30 alkyl sulfates, C8-C30 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 anionic surfactants can be used, for example, in amounts of a total amount of 0.2 to 8.0 wt.%, preferably 0.4 to 5.0 wt.%, and particularly preferably 0.6 to 2.5 wt.% - based on the total weight of the agent (b). A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (b) in container (B) contains - based on the total weight of the agent (b) - one or more anionic surfactants in a total amount of 0.2 to 8.0 wt.%, preferably 0.4 to 5.0 wt.%, and particularly preferably 0.6 to 2.5 wt.%. The aqueous carrier agents (b) can be formulated as either a gel or an emulsion. For the purposes of this invention, an emulsion is understood to be a finely dispersed mixture of two normally immiscible phases without visible separation. When the agent (b) is formulated as an emulsion, it particularly preferably additionally contains at least one fat component. 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.%. Particularly preferentially, the product (b) contains one or more C12-C30 fatty alcohols as a fat component. Surprisingly, it has been found that when the product (b) is in the form of an emulsion and contains at least one C12-C30 fatty alcohol, the odor development could be minimized even further. 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). A particularly preferred multi-component packaging unit (kit-of-parts) is further characterized in that the agent (b) in container (B) additionally contains at least one C12-C30 fatty alcohol. 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 content of the hydrogen peroxide contained in the means (b) - based on the total weight of the means (b) - is below 1.0 wt.%, preferably below 0.5 wt.%, more preferably below 0.1 wt.% and particularly preferably below 0.01 wt.%. In a further preferred embodiment, a multi-component packaging unit (kit-of-parts) according to the invention is also characterized in that the total content of the persulfate salts contained in the agent (b) - based on the total weight of the agent (b) - is below 1.0 wt.%, preferably below 0.5 wt.%, more preferably below 0.1 wt.% and particularly preferably below 0.01 wt.%. Funds (c) in container (C) The multi-component packaging unit according to the invention can optionally further comprise a third container (C) which contains the agent (c) in a separately packaged form. The agent (c) can, for example, be a pretreatment agent or a post-treatment agent. It is also conceivable to add product (c) to the multi-component packaging unit as conditioning drops, wherein product (c) contains, for example, a conditioning or conditioning component that is packaged separately from products (a) and (b) for stability reasons. In this case, products (a), (b), and (c) can be mixed together to produce the ready-to-use bleach. In this third component (c), further odor-intensive reducing agents are also avoided where possible. In a further preferred embodiment, a multi-component packaging unit (kit-of-parts) according to the invention is therefore characterized in that it comprises a container (C) containing a cosmetic agent (c) and is packaged separately, wherein the total content of all metal salts contained in the agent (c) from the group consisting of magnesium salts, zinc salts, iron salts, copper salts and calcium salts, based on the total weight of the agent (c), is below 0.1 wt.%. The compositions (b) and optionally (c) according to the invention may additionally contain at least one oil component. In the case of composition (b), this additionally usable oil component is understood to be a component other than C12-C30 fatty alcohols. Suitable oil components according to the invention are, in principle, all oils and fats as well as their mixtures with solid paraffins and waxes. Oil components whose solubility in water at 20 °C is less than 1 wt.%, in particular less than 0.1 wt.%, are preferred. The melting point of the individual oil or fat components is preferably below about 40 °C. Oil components that are liquid at room temperature, i.e., below 25 °C, may be particularly preferred according to the invention. However, when using several oil and fat components as well as optionally solid paraffins and waxes, it is generally also sufficient if the mixture of the oil and fat components as well as optionallyParaffins and waxes meet these conditions. A preferred group of oil components are vegetable oils. Examples of such oils include apricot kernel oil, avocado oil, sunflower oil, olive oil, soybean oil, rapeseed oil, almond oil, jojoba oil, orange oil, wheat germ oil, peach kernel oil, and the liquid components of coconut oil. Other triglyceride oils, such as the liquid components of beef tallow, as well as synthetic triglyceride oils, are also suitable. Another particularly preferred group of oil components that can be used according to the invention are liquid paraffin oils and synthetic hydrocarbons as well as di-n-alkyl ethers with a total of between 12 and 36 C atoms, in particular 12 to 24 C atoms, such as di-n-octyl ether, di-n-decyl ether, di-n-nonyl ether, di-n-undecyl ether, di-n-dodecyl ether, n-hexyl-n-octyl ether, n-octyl-n-decyl ether, n-decyl-n-undecyl ether, n-undecyl-n-dodecyl ether and n-hexyl-n-undecyl ether as well as di-tert-butyl ether, di-iso-pentyl ether, di-3-ethyldecyl ether, tert-butyl-n-octyl ether, iso-pentyl-n-octyl ether and 2-methyl-pentyl-n-octyl ether. The commercially available compounds 1,3-Di-(2-ethyl-hexyl)-cyclohexane (Cetiol®S) and Di-n-octyl ether (Cetiol®OE) may be preferred. Oil components that can also be used according to the invention are fatty acid and fatty alcohol esters. Monoesters of fatty acids with alcohols having 3 to 24 carbon atoms are preferred. This group of substances comprises the products of the esterification of fatty acids with 8 to 24 carbon atoms, such as caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, elaeostearic acid, arachidic acid, gadoleic acid, behenic acid, and erucic acid, as well as their technical mixtures, which, for example,during the pressure cleavage of natural fats and oils, during the reduction of aldehydes from Roelen's oxo synthesis or the dimerization of unsaturated fatty acids, with alcohols such as isopropyl alcohol, glycerol, capron alcohol, capryl alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, linolyl alcohol, linolenyl alcohol, elaeostearyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and brassidyl alcohol as well as their technical mixtures, which are used in the production of, for example, B. during the high-pressure hydrogenation of technical methyl esters based on fats and oils or aldehydes from Roelen's oxo synthesis, as well as being produced as a monomer fraction during the dimerization of unsaturated fatty alcohols.Particularly preferred according to the invention are isopropyl myristate, isononanic acid C16-18 alkyl ester (Cetiol®SN), stearic acid 2-ethylhexyl ester (Cetiol®868), cetyl oleate, glyceryl tricaprylate, coconut fatty alcohol caprylate / caprylate and n-butyl stearate. Furthermore, dicarboxylic acid esters such as di-n-butyl adipate, di-(2-ethylhexyl) adipate, di-(2-ethylhexyl) succinate and di-isotridecyl acelaate, as well as diol esters such as ethylene glycol dioleate, ethylene glycol di-isotridecanoate, propylene glycol di(2-ethylhexanoate), propylene glycol di-isostearate, propylene glycol di-pelargonate, butanediol di-isostearate and neopentyl glycol di-capylate, are oil components usable according to the invention, as are complex esters such as diacetylglycerol monostearate. Finally, silicone oils, in particular dialkyl and alkylarylsiloxanes, such as dimethylpolysiloxane and methylphenylpolysiloxane, as well as their alkoxylated and quaternized analogues and cyclic siloxanes, are also preferred oil components according to the invention. Examples of such silicones are the products marketed by Dow Corning under the designations DC 190, DC 200, and DC 1401, as well as the commercial products DC 344 and DC 345 from Dow Corning, Q2-7224 (manufacturer: Dow Corning; a stabilized trimethylsilylamodimethicone), Dow Corning® 929 Emulsion (containing a hydroxyl-amino-modified silicone, also known as amodimethicone), SM-2059 (manufacturer: General Electric), SLM-55067 (manufacturer: Wacker), and Abil®-Quat 3270 and 3272 (manufacturer: Th. Goldschmidt; diquaternary polydimethylsiloxanes, Quaternium-80). Preferably, according to the invention, silicone oils can have a kinematic viscosity of up to 50,000 cSt measured at 25 °C.Silicone oils with kinematic viscosities up to 10,000 cSt measured at 25 °C are particularly preferred. Viscosities are determined using the falling ball method according to British Standard 188. Comparable values ​​can be obtained using manufacturers' test procedures analogous to British Standard 188, such as Dow Corning Corporation's CTM 0577. In a particular embodiment, cyclic siloxanes such as Dow Corning®344, Dow Corning®345, Dow Corning®244, Dow Corning®245 or Dow Corning®246 with kinematic viscosities of up to 10,000 cSt at 25 °C, determined according to the manufacturer's specifications, are used as the oil component. Finally, dialkyl carbonates, as described in detail in DE-OS 197 101 54, to which explicit reference is made, are also suitable oil components for use according to the invention. Dioctyl carbonates, in particular di-2-ethylhexyl carbonate, are preferred oil components within the scope of the present invention. In a further embodiment, emulsifiers can be used in the compositions (a), (b) and / or (c) according to the invention. In composition (a), emulsifiers that are solid at room temperature can be used according to the invention. Emulsifiers cause the formation of water- or oil-stable adsorption layers at the phase interface.which protect the dispersed droplets against coalescence and thus stabilize the emulsion. Emulsifiers, like surfactants, are therefore composed of a hydrophobic and a hydrophilic molecular part. Hydrophilic emulsifiers preferentially form oil-in-water (O / W) emulsions, and hydrophobic emulsifiers preferentially form water-in-oil (W / O) emulsions. An emulsion is defined as a droplet-shaped distribution (dispersion) of one liquid in another, achieved through the expenditure of energy to create stabilizing phase interfaces using surfactants. The selection of these emulsifying surfactants or emulsifiers depends on the substances to be dispersed, the respective external phase, and the fineness of the emulsion. Further definitions and properties of emulsifiers can be found in "H.-D. Dörfler, Interfacial and Colloidal Chemistry," VCH Verlagsgesellschaft mbH, Weinheim.1994". Emulsifiers usable according to the invention are, for example: - Addition products of 4 to 100 mol of ethylene oxide and / or 0 to 5 mol of propylene oxide to linear fatty alcohols with 8 to 22 carbon atoms, to fatty acids with 12 to 22 carbon atoms, and to alkylphenols with 8 to 15 carbon atoms in the alkyl group; - C12-C22 fatty acid mono- and diesters of addition products of 1 to 30 mol of ethylene oxide to polyols with 3 to 6 carbon atoms, in particular to glycerol; - Ethylene oxide and polyglycerol addition products to methyl glucoside fatty acid esters, fatty acid alkanolamides, and fatty acid glucamides; - C8-C22 alkyl mono- and oligoglycosides and their ethoxylated analogues, wherein degrees of oligomerization range from 1.1 to 5, especially 1.2 to 2.0, and glucose as the sugar component are preferred,- Mixtures of alkyl (oligo)glucosides and fatty alcohols, for example the commercially available product Montanov®68,- Addition products of 5 to 60 mol of ethylene oxide to castor oil and hydrogenated castor oil,- Partial esters of polyols with 3-6 carbon atoms with saturated fatty acids with 8 to 22 carbon atoms; - Sterols. Sterols are a group of steroids that have a hydroxyl group at carbon atom 3 of the steroid backbone and are isolated from both animal tissue (zoosterols) and plant fats (phytosterols). Examples of zoosterols are cholesterol and lanosterol. Examples of suitable phytosterols are ergosterol, stigmasterol, and sitosterol. Sterols, the so-called mycosterols, are also isolated from fungi and yeasts. - Phospholipids. This includes, in particular, glucose phospholipids, which are obtained, for example, as lecithins or phosphatidylcholines from egg yolks or plant seeds (e.g., soybeans). It also includes fatty acid esters of sugars and sugar alcohols, such as sorbitol, and polyglycerols and polyglycerol derivatives such as polyglycerol poly-12-hydroxystearate (trade product Dehymuls®PGPH).Linear and branched fatty acids with 8 to 30 carbon atoms and their Na, K, Ca, Mg and Zn salts. The compositions according to the invention preferably contain the emulsifiers in amounts of 0.1 to 25 wt. %, in particular 0.1 to 3 wt. %, based on the respective total composition. Preferably, the compositions according to the invention can contain at least one nonionic emulsifier with an HLB value of 8 to 18, according to the definitions given in the Römpp-Lexikon Chemie (ed. J. Falbe, M. Regitz), 10th edition, Georg Thieme Verlag Stuttgart, New York, (1997), page 1764. Nonionic emulsifiers with an HLB value of 10 to 15 may be particularly preferred according to the invention. Furthermore, it has proven advantageous if the agents according to the invention contain a conditioning active ingredient selected from protein hydrolysates and their derivatives. Suitable protein hydrolysates include, in particular, elastin, collagen, keratin, milk, egg white, silk protein, soy protein, almond protein, pea protein, potato protein, oat protein, corn protein, and wheat protein hydrolysates. According to the invention, plant-based products may be preferred. Suitable derivatives are, in particular, quaternized protein hydrolysates. Examples of this class of compounds are the products marketed under the names Lamequat®L (CTFA designation: Lauryldimonium Hydroxypropylamino Hydrolyzed Animal Protein; Grünau), Croquat®WKP, and Gluadin®WQ. The latter product, which is plant-based, may be preferred. The protein derivatives are preferably contained in the compositions according to the invention in amounts of 0.1 to 10 wt.%, based on the total amount of the composition. Amounts of 0.1 to 5 wt.% are preferred. Preferably, the compositions (a), (b) and / or optionally (c) according to the invention further contain at least one conditioning agent. Cationic polymers are the preferred conditioning agents. These are generally polymers containing a quaternary nitrogen atom, for example in the form of an ammonium group. Preferred cationic polymers include, for example: - quaternized cellulose derivatives, such as those commercially available under the names Celquat® and Polymer JR®. The compounds Celquat®H 100, Celquat®L 200, and Polymer JR®400 are preferred quaternary cellulose derivatives. - polysiloxanes with quaternary groups; - polymers of dimethyldiallylammonium salts and their copolymers with esters and amides of acrylic and methacrylic acids. The products commercially available under the names Merquat®100 (poly(dimethyldiallylammonium chloride)) and Merquat®550 (dimethyldiallylammonium chloride-acrylamide copolymer) are examples of such cationic polymers; - copolymers of vinylpyrrolidone with quaternary derivatives of dialkylaminoacrylate and methacrylate, such as vinylpyrrolidone-dimethylaminomethacrylate copolymers quaternized with diethyl sulfate. These compounds are commercially available under the names Gafquat®734 and Gafquat®755.- Vinylpyrrolidone-vinylimidazolinium methochloride copolymers, such as those offered under the name Luviquat®, - quaternized polyvinyl alcohol, as well as the polymers known under the names - Polyquaternium 2, - Polyquaternium 17, - Polyquaternium 18 and - Polyquaternium 27 with quaternary nitrogen atoms in the polymer main chain. Amphopolymers are also suitable as conditioning agents. The term amphopolymer encompasses amphoteric polymers, i.e., polymers that contain both free amino groups and free -COOH or SO3H groups in their molecules and are capable of forming internal salts; zwitterionic polymers that contain quaternary ammonium groups and -COO- or -SO3- groups in their molecules; and polymers that contain -COOH or SO3H groups and quaternary ammonium groups. An example of an amphopolymer that can be used according to the invention is the acrylic resin available under the name Amphomer®, which is a copolymer of tert-butylaminoethyl methacrylate, N-(1,1,3,3-tetramethylbutyl)acrylamide, and two or more monomers from the group consisting of acrylic acid, methacrylic acid, and their simple esters. Also preferred are amphopoils composed of unsaturated carboxylic acids (e.g., acrylic and methacrylic acid), cationically derivatized unsaturated carboxylic acids (e.g., cyanide ...B. Acrylamidopropyl trimethyl ammonium chloride) and optionally further ionic or nonionic monomers, as can be seen, for example, in German patent application 39 29 973 and the prior art cited therein. Terpolymers of acrylic acid, methyl acrylate and methacrylamidopropyltrimonium chloride, such as those commercially available under the name Merquat®2001 N, as well as the commercial product Merquat®280, are particularly preferred ampho-polymers according to the invention. The cationic or amphoteric polymers are preferably contained in the preparations according to the invention in amounts of 0.1 to 5 wt.%, based on the total preparation. Suitable conditioning agents also include silicone gums, such as the commercial product Fancorsil®LIM-1, and anionic silicones, such as the product Dow Corning®1784. Examples of cationic surfactants that can be used as conditioning agents in the compositions according to the invention are, in particular, quaternary ammonium compounds. Ammonium halides, especially chlorides and bromides, such as alkyltrimethylammonium chlorides, dialkyldimethylammonium chlorides, and trialkylmethylammonium chlorides, e.g., cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, distearyldimethylammonium chloride, lauryldimethylammonium chloride, lauryldimethylbenzylammonium chloride, and tricetylmethylammonium chloride, are preferred. Furthermore, the highly biodegradable quaternary ester compounds, so-called "esterquats," such as the methylhydroxyalkyl-dialkoyloxyalkyl-ammonium methosulfates marketed under the trademarks Dehyquart® and Stepantex®, can be used. Alkylamidoamines, especially fatty acid amidoamines such as stearylamidopropyldimethylamine available under the name Tego Amid®S 18, are characterized not only by their good conditioning effect but also by their good biodegradability. Furthermore, it may be preferable to color the individual phases with dyes to achieve a particularly pleasing optical appearance of the composition. These dyes are preferably soluble only in the aqueous phase or only in at least one non-aqueous phase in an amount sufficient to make the corresponding coloration visible to the observer. It is also possible to color both the non-aqueous and the aqueous phases with different dyes, preferably in different colors. However, coloring only a non-aqueous phase is preferred. Other common components for the compositions according to the invention are: - anionic surfactants such as soaps, alkyl sulfates and alkyl polyglycol ether sulfates, salts of ether carboxylic acids of the formula RO-(CH2-CH2O)x-CH2-COOH, in which R is a linear alkyl group with 10 to 22 carbon atoms and x = 0 or 1 to 16, acyl sarcosides, acyl taurides, acyl isethionates, sulfosuccinic acid mono- and dialkyl esters, linear alkane sulfonates, linear alpha-olefin sulfonates, alpha-sulfofaticial methyl esters and esters of tartaric acid and citric acid, alkyl glycosides or alcohols, which represent addition products of about 2-15 molecules of ethylene oxide and / or propylene oxide to fatty alcohols with 8 to 22 carbon atoms. - zwitterionic surfactants such as betaines and 2-Alkyl-3-carboxymethyl-3-hydroxyethyl-imidazolines.- Ampholytic surfactants, such as 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; non-ionic surfactants such as addition products of 2 to 30 mol of ethylene oxide and / or 0 to 5 mol of propylene oxide to linear fatty alcohols with 15 to 22 carbon atoms, to fatty acids with 12 to 22 carbon atoms and to alkylphenols with 8 to 15 carbon atoms in the alkyl group, C12-C22 fatty acid mono- and diesters of addition products of 1 to 30 mol of ethylene oxide to glycerol, C8-C22 alkyl mono- and oligoglycosides and their ethoxylated analogues, as well as addition products of 5 to 60 mol of ethylene oxide to castor oil and hydrogenated castor oil; non-ionic polymers such as vinylpyrrolidone / vinyl acrylate copolymers. Polyvinylpyrrolidone and vinylpyrrolidone / vinyl acetate copolymers, anionic polymers such as polyacrylic and polymethacrylic acids, their salts, their copolymers with acrylic and methacrylic acid esters and amides and their derivatives obtained by cross-linking with polyfunctional agents,Polyoxycarboxylic acids, such as polyketo and polyaldehydocarboxylic acids and their salts, as well as polymers and copolymers of crotonic acid with esters and amides of acrylic and methacrylic acid, such as vinyl acetate-crotonic acid and vinyl acetate-vinyl propionate-crotonic acid copolymers, organic thickeners such as agar-agar, guar gum, alginates, cellulose ethers such as methyl and methylhydroxypropyl cellulose, gelatin, pectins and / or xanthan gum. Ethoxylated fatty alcohols, especially those with limited homolog distribution, such as those marketed under the name Arlypon®F (Henkel), alkoxylated methyl glucoside esters, such as the commercial product Glucamate®DOE 120 (Amerchol), and ethoxylated propylene glycol esters, such as the commercial product Antil®141 (Goldschmidt), can be preferred organic thickeners. Other suitable organic thickeners include structuring agents such as glucose and maleic acid, and hair-conditioning compounds such as phospholipids, for example, soy lecithin.Egg lecithin and cephalins, perfume oils, solubilizers such as ethanol, isopropanol, ethylene glycol, propylene glycol, glycerin, diethylene glycol and ethoxylated triglycerides, as well as fatty alcohol ethoxylates and their derivatives, anti-dandruff agents such as climbazole, piroctone olamines and zinc omadine, active ingredients such as bisabolol, allantoin, panthenol, niacinmide, tocopherol and plant extracts, light protectants, consistency enhancers such as sugar esters, polyol esters or polyol alkyl ethers, fatty acid alkanolamides, complexing agents such as EDTA, NTA, β-alanine diacetic acid and phosphonic acids, swelling and penetration agents such as PCA, glycerin, propylene glycol monoethyl ether, carbonates, hydrogen carbonates, guanidines, ureas, as well as primary, secondary and tertiary phosphates, Opaque agents such as latex or styrene / acrylamide copolymers, pearlescent agents such as ethylene glycol mono- and distearate or PEG-3 distearate, direct dyes, and propellants such as propane-butane mixtures, N2O, dimethyl ether, CO2, and air.Furthermore, the compositions (a), (b) and / or (c) 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, 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.; The selection of these additional substances will be made by a person skilled in the art according to the desired properties of the composition. Regarding further optional components and the quantities of these components used, explicit reference is made to the relevant handbooks known to those skilled in the art. The additional active ingredients and excipients are preferably used in the compositions according to the invention in quantities of 0.0001 to 25 wt.% each, and in particular from 0.0005 to 15 wt.%, based on the total weight of the application mixture. Decolorization of dyed keratin fibers The multi-component packaging unit according to the invention is a system comprising means (a) and (b) (and optionally additionally (c)), which is used for the decolorization of 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 and 2,6-dihydroxy-3,4-dimethylpyridine. 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. The multi-component packaging unit (kit-of-parts) according to the invention can be used, for example, to decolorize keratin fibers that have been dyed with the dyes known under the following 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 their 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.%, more preferably at most 0.05 wt.% and particularly preferably at most 0.01 wt.% - based on the total weight of the compound (a); - 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.%, more preferably at most 0.05 wt.% and particularly preferably at most 0.01 wt.% - based on the total weight of the compound (b); and - the total amount of all dyes and oxidation dye precursors contained in the compound (c) is at a value of at most 0.2 wt.%, preferably at most 0.1 wt.%, more preferably at most 0.05 wt.%.-% and particularly preferably of a maximum of 0.01 wt.% - based on the total weight of the agent (c). All quantities stated here refer to the total quantity of all dyes contained in the respective product from the group of direct dyes, oxidation dye precursors and natural dyes, which is related to the total weight of the respective product. Mixing ratio of agents (a) and (b) 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 1:100 to 100:1. To ensure convenient mixing, it may be advantageous to use approximately equal amounts of both agents (a) and (b). In particular, if agent (b) contains acids in a more concentrated form, it may also be advantageous to use agent (a) in excess. Conversely, if agent (a) is formulated anhydrous, it may also be advantageous to use agent (b) in excess. The composition (a) contains the reducing agent(s) (a1) in a total amount of 60.0 to 100 wt.%, preferably 70.0 to 100 wt.%, more preferably 80.0 to 100 wt.%, and particularly preferably 90.0 to 100 wt.% – based on the total weight of the composition (a). The reducing agent(s) are therefore present in a relatively concentrated form in the composition (a). Especially when the reducing agents are used in these concentration ranges on average (a), the use of an excess of agent (b) is desirable. 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 1:99 to 30:70, preferably 1:99 to 20:80, more preferably 1:99 to 15:85 and most preferably 1:99 to 10:90. In a ratio (a) / (b) of 10:90, 10 parts by weight of the product (a) are mixed with 90 parts by weight of the product (b). In a further particularly 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 1:99 to 30:70, preferably 1:99 to 20:80, more preferably 1:99 to 15:85 and most preferably 1:99 to 10:90. 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 containers (A) and (B) into a third container, which then allows the mixing of both agents - e.g. by shaking or stirring. 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 is therefore a process 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 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. Steps (I), (II), (III) and (IV) of the procedure represent the decolorization process of the keratin fibers and are therefore carried out in direct temporal succession. A particularly preferred method according to the invention is characterized in that the agents (a) and (b) are mixed in step (I) in a quantity ratio of (a) / (b) of 1:99 to 30:70, preferably 1:99 to 20:80, more preferably 1:99 to 15:85 and most preferably 1:99 to 10:90. The process according to the invention is particularly effective for keratin fibers that have been dyed with certain oxidation dye precursors. Good results were achieved especially when the decolorization process was applied to keratin fibers that had been dyed with one or more oxidation dye precursors from the group of p-phenylenediamine, p-toluenediamine, N,N-bis-(β-hydroxyethyl)-p-phenylenediamine, 2-(β-hydroxyethyl)-p-phenylenediamine and / or 2-(methoxymethyl)-p-phenylenediamine. A preferred method according to the invention is therefore further characterized in that the ready-to-use decolorizing agent is applied to keratinous fibers that have been dyed with at least one oxidation dye precursor from the group consisting of p-phenylenediamine, p-toluenediamine, N,N-bis-(β-hydroxyethyl)-p-phenylenediamine, 2-(β-hydroxyethyl)-p-phenylenediamine and / or 2-(methoxymethyl)-p-phenylenediamine. Regarding further preferred embodiments of the method according to the invention, what has been said about the multi-component packaging unit 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. 1.2. Discoloration The following decolorizing agents were produced: Agent (a) Agent (a) Sodium editide 5.0 g Formamidine sulfinic acid - 5.0 g Means (b) Means (b) Cetearyl alcohol 2.9 g 2.9 g PEG-40 Castor Oil 0.55 g 0.55 g Sodium cetearyl sulfate0.28 g0.28 g Hydroxyethane-1,1-disposphonic acid (1-Etidronic acid) 0.24 g Monoethanolamine-0.95 Water (distilled) to 95 g Means (b) Means (b) Natrosol 250 (Hydroxyethylcellulose)1.91.9 Hydroxyethane-1,1-disposphonic acid (1-Etidronic acid) 0.24 g Monoethanolamine-0.95 Water (distilled) to 95 g Agent (a)V was mixed with agents (b1) and (b3) respectively (5 g of agent (a) and 95 g of agent (b)). (a)V + (b1): Comparison, decolorizing agent with sodium dithionite, emulsion. (a)V + (b3): ​​Comparison, decolorizing agent with sodium dithionite, gel. The agent (a)E was mixed with agents (b2) and (b4) (5 g of agent (a) and 95 g of agent (b)) (a)E + (b2): according to the invention, decolorizing agent with formamidine sulfinic acid, emulsion (a)E + (b4): according to the invention, decolorizing agent with formamidine sulfinic acid, gel These ready-to-use color removers were each applied to the hair colored as described in point 1.1 and left to act for 30 minutes at a temperature of 30 °C. During application, the odor development of each bleaching agent was rated by 10 trained individuals using a scale of 1 to 4. The average of the 10 individual ratings was then calculated. (a)V + (b1): Comparison, decolorizing agent with sodium dithionite, emulsion3 (a)V + (b3): ​​Comparison, decolorizing agent with sodium dithionite, Gel4 (a)E + (b2): according to the invention, decolorizing agent with formamidine sulfinic acid, emulsion1 (a)E + (b4): according to the invention, decolorizing agent with formamidine sulfinic acid, Gel2

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 solid or powdered cosmetic agent (a) and a container (B) containing an aqueous cosmetic agent (b), wherein 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 60.0 to 100.0 wt.%, (a1) wherein one or more sulfinic acid derivatives are selected from the group consisting of: (H2N)(NH)C(SO2H) formamidine sulfinic acid, HN(CH2SO2Na)2, disodium [(sulfinatomethyl)amino]methanesulfinate, and 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, and- the agent (b) in container (B) has a pH value in the range of 7.5 to 12.0, and- the total content of all metal salts contained in the agent (a) from the group consisting of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the agent (a) - is below 0.1 wt%,and- the total content of all metal salts contained in the average (b) from the group of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the average (b) - is below 0.1 wt.%. 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) contains - based on the total weight of the agent (a) - one or more sulfinic acid derivatives from group (a1) in a total amount of 70.0 to 100.0 wt.%, preferably 80.0 to 100.0 wt.% and particularly preferably 90.0 to 100.0 wt.%. Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 3, characterized in that - the total content of all metal salts contained in the compound (a) from the group consisting of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the compound (a) - is below 0.01 wt% and - the total content of all metal salts contained in the compound (b) from the group consisting of magnesium salts, zinc salts, iron salts, copper salts and calcium salts - based on the total weight of the compound (b) - is below 0.01 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) additionally contains (a2) one or more dissolution accelerators from the group consisting of homopolymers of (meth)acrylic acid, copolymers of (meth)acrylic acid, polyvinylpyrrolidone (PVP), celluloses, cellulose derivatives, starch, starch derivatives, alginates and / or casein derivatives. Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 5, characterized in that the agent (a) in container (A) additionally contains (a3) ​​particulate silicon dioxide as a flow aid. Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 6, characterized in that - based on the total weight of the agent (a) -- the total content of all reducing agents contained in the agent (a) from the group consisting of sodium sulfite, sodium hydrogen sulfite, potassium sulfite, potassium hydrogen sulfite, ammonium sulfite, hydroxymethanesulfinic acid, aminomethanesulfinic acid, cysteine, thiolactic acid, thioglycolic acid and all physiologically acceptable salts of these compounds is below 0.5 wt.%, preferably below 0.1 wt.% and particularly preferably below 0.05 wt.%. Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 7, characterized in that the agent (b) in container (B) - based on the total weight of the agent (b) - (b1) has a water content of at least 60.0 wt.%, preferably at least 70.0 wt.%, more preferably at least 80.0 wt.% and most preferably at least 90.0 wt.%. Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 8, characterized in that the agent (b) in container (B) has a pH value in the range of 8.0 to 11.5, preferably 8.5 to 11.0 and particularly preferably 9.0 to 10.

5. Multi-component packaging unit (kit-of-parts) according to one of claims 1 to 9, characterized in that the agent (b) additionally contains at least one alkalizing agent from the group consisting of monoethanolamine, triethanolamine, 2-amino-2-methyl-propanol, arginine, lysine and / or histidine.