三剂型天然染发剂中预处理剂的应用研究

Study of natural hair dyes and its application condition

三剂型天然染发剂采用天然氨基酸为主原料配制预处理剂(A剂)对头发进行预处理,以媒染剂(B剂)与中药五倍子提取物(C剂)络合赋予人发自然黑色。影响染色效果的因子较多,但以A剂的影响较大。在B剂、C剂因子水平固定的情况下,研究了A剂中氨基酸用量、A剂预处理过程中pH、时间和温度等对染色效果的影响。结果表明,A剂中氨基酸质量分数为10%,预处理过程中pH=8~9,30℃~35℃,15 min^20 min时,染色效果较佳。

Natural amino acid was used in formulation of pretreatment agent for hair dyeing （ Agent A） while the mordant （Agent B ） complexed with gallnuts extract （Agent C ） can provide the natural black color of human hair. There are many factors that affect the dyeing result, in which the effect of Agent A is the major one. Under fixed conditions referring to Agent B and Agent C, effects with respect to dosage of amino acid, pH, dyeing temperature and time were investigated. The results showed that good dyeing result can be obtained when the dosage of amino acid achieves 10% ,the pH is kept as 8 -9,the dyeing time takes 15 min -20 min and the dyeing temperature is maintained at 30 ℃ -35 ℃.