| 摘要 |
PROBLEM TO BE SOLVED: To obtain a pre-treating agent for hair dyeing, capable of improving a hair-dyeing capacity, uniform dyeing property, color fastness, or the like, of a hair-dyeing agent and also excellent in moisture-retaining property by applying it before the hair-dyeing treatment. SOLUTION: This pre-treating agent for hair dyeing is characterized by comprising (A) a keratin hydrolysate having 20000-30000 average molecular weight and (B) a protein hydrolysate having 400-2000 average molecular weight.
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