Henkel Ag & Company, Kgaa

René Krohn

Erik Schulze Zur Wiesche

The subject matter of the present disclosure is a hair treatment agent for reducing and/or avoiding bleeding out and/or fading of artificially produced hair colours and/or for strengthening the internal hair structure, containing&#x2014;relative to the total quantity of hair treatment agent&#x2014;

Hair treatment agent with a polyvalent metal cation I

A cosmetic agent for treating keratin fibers is provided herein. The cosmetic agent includes, in a cosmetically acceptable carrier, in relation to the total weight of the cosmetic agent, from about 0.001 to about 10 wt. % of at least one protein which has a content of glutamic acid and/or aspartic acid of from about 10 to about 60%, in relation to the total content of all amino acids of the protein. The cosmetic agent further includes, in a cosmetically acceptable carrier, in relation to the total weight of the cosmetic agent, from about 0.01 to about 10 wt. % of at least one salt which includes at least one divalent cation, and/or of at least one salt which includes at least one trivalent cation.

Hair treatment agent containing at least one acid protein and at least one salt

The present disclosure relates to a hair treatment agent for reducing and/or avoiding bleeding out and/or fading of artificially produced hair colours with a pH in a range of from about 3.5 to about 5 containing&#x2014;relative to the total quantity of hair treatment agent&#x2014;

Hair treatment agent with a polyvalent cation II

A method for the color retention of dyed keratin fibers is provided herein. The method includes i. applying a cosmetic composition to dyed keratin fibers as a pretreatment agent for keratin. The method further includes ii. subjecting the keratin fibers to a dyeing and/or brightening within a period of about 5 seconds to about 24 hours after to step i. The cosmetic composition has, based on its own weight, from about 0.01 to about 4.00% by weight of at least one alum and a pH value in the range of about 2.5 to about 5.

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Norderstedt, Germany

René Krohn