Compositions, methods and kits for reductively removing color from dyed hair

An aqueous or aqueous-alcoholic reductive composition for reductively removing color from hair dyed with oxidative hair dye compounds, said reductive composition in the form of a gel, cream, emulsion, foam or solution and having a pH of from 1.8 to 6 and wherein said reductive composition consists essentially of:

• water;
• from 1 to 50% by weight of at least one reductone;
• from 0.1 to 10% by weight of at least one thiol;
• from 0.001 to 5% by weight of at least one sulfite;
• an amount of at least one pH adjusting agent sufficient for adjusting said pH to a predetermined value between 1.8 and 6, said at least one pH adjusting agent being selected from the group consisting phosphoric acid, acetic acid, glycolic acid, salicylic acid, glutathione, gluconic acid lactone, α-hydroxycarboxylic acids, alkanolamines, alkylamines, alkali hydroxides, ammonium hydroxide, alkali carbonates, ammonium carbonates and alkali phosphates;
• and
• at least one cosmetic additive selected from the group consisting of lower aliphatic alcohols, glycols, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, thickeners, starch, cellulose derivatives, perfumes, hair conditioners, hair volumizers, preservatives, petrolatum, paraffin oils, cationic resins, fatty acids, cholesterol, pantothenic acid and betaine.

A method for reductively removing color from hair dyed with oxidative hair dye compounds, said method consisting of the steps of:

• a) providing an aqueous or aqueous-alcoholic reductive composition for removing color from hair dyed with oxidative hair dye compounds, said reductive composition being in the form of a gel, cream, emulsion, foam or solution and having a pH of from 1.8 to 6, and wherein said reductive composition consists essentially of water;
• a first combination of from 1 to 50% by weight of at least one reductone and from 0.1 to 10% by weight of at least one thiol or a second combination of from 1 to 50% by weight of at least one reductone, from 0.1 to 10% by weight of at least one thiol and from 0.001 to 5% by weight of at least one sulfite;
• an amount of at least one pH adjusting agent sufficient for adjusting said pH to a predetermined value between 1.8 and 6, said at least one pH adjusting agent being selected from the group consisting of phosphoric acid, acetic acid, glycolic acid, salicylic acid, glutathione, gluconic acid lactone, α-hydroxycarboxylic acids, alkanolamines, alkylamines, alkali hydroxides, ammonium hydroxides, alkali carbonates, ammonium carbonates and alkali phosphates;
• and at least one cosmetic additive selected from the group consisting of lower aliphatic alcohols, glycols, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, thickeners, starch, celluose derivatives, perfumes, hair conditioners, hair volumizers, preservatives, petrolatum, paraffin-oils, cationic resins, fatty acids, cholesterol, pantothenic acid and betaine;
• b) applying an effective amount of said aqueous or aqueous-alcoholic composition for reductively removing color to hair dyed with said oxidative hair dye compounds;
• c) allowing the reductive composition applied in step b) to act on the hair for a period from 5 to 60 minutes at a temperature of 20 to 50° C.;
• and
• d) after the allowing of step c), rinsing the composition from the hair with water and washing the hair with a shampoo as needed and subsequently drying the hair.

A multicomponent kit for successively coloring hair and reductively removing color from dyed hair, said multicomponoent kit consisting of a first part and a second part;

• wherein said first part consists of a composition for oxidative dyeing of hair, and said second part consists of a reductive composition for reductive removal of color from dyed hair, said second composition having a pH value of from 1.8 to 6 and consisting essentially of:
• water;
• from 1 to 50% by weight of at least one reductone;
• from 0.1 to 10% by weight of at least one thiol;
• an amount of at least one pH adjusting agent sufficient for adjusting said pH to a predetermined value between 1.8 and 6, said at least one pH adjusting agent being selected from the group consisting phosphoric acid, acetic acid, glycolic acid, salicylic acid, glutathione, gluconic acid lactone, α-hydroxycarboxylic acids, alkanolamines, alkylamines, alkali hydroxides, ammonium hydroxide, alkali carbonates, ammonium carbonates and alkali phosphates;
• and
• at least one cosmetic additive selected from the group consisting of lower aliphatic alcohols, glycols, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, thickeners, starch, cellulose derivatives, perfumes, hair conditioners, hair volumizers, preservatives, petrolatum, paraffin oils, cationic resins, fatty acids, cholesterol, pantothenic acid and betaine.

A multicomponent kit for successively coloring hair and reductively removing color from dyed hair, said multicomponoent kit consisting of a first part and a second part;

• wherein said first part consists of a composition for oxidative dyeing of hair, and said second part consists of a reductive composition for reductive removal of color from dyed hair, said second composition having a pH value of from 1.8 to 6 and consisting essentially of:
• water;
• from 1 to 50% by weight of at least one reductone;
• from 0.1 to 10% by weight of at least one thiol;
• from 0.001 to 5% by weight of at least one sulfite;
• an amount of at least one pH adjusting agent sufficient for adjusting said pH to a predetermined value between 1.8 and 6, said at least one pH adjusting agent being selected from the group consisting phosphoric acid, acetic acid, glycolic acid, salicylic acid, glutathione, gluconic acid lactone, α-hydroxycarboxylic acids, alkanolamines, alkylamines, alkali hydroxides, ammonium hydroxide, alkali carbonates, ammonium carbonates and alkali phosphates;
• and
• at least one cosmetic additive selected from the group consisting of lower aliphatic alcohols, glycols, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, thickeners, starch, cellulose, hydroxymethyl cellulose derivatives, perfumes, hair conditioners, hair volumizers, preservatives, petrolatum, paraffin oils, cationic resins, fatty acids, cholesterol, pantothenic acid and betaine.