Process for dyeing hair with natural dye

The invention discloses a process for dyeing hair with natural dye. The process adopts a pre-mordanting process or a post-mordanting process for hair dyeing, wherein the pre-mordanting process comprises steps of pretreatment, pre-mordanting treatment and dyeing; the post-mordanting process comprises steps of pretreatment, dyeing and post-mordanting treatment. According to the process for dyeing the hair with the natural dye which has better dyeing property, natural pigment can reach the cortex layer smoothly through the cuticle layer, when the process is used for dyeing hair from black to a light color or a bright color, higher-dosage hydrogen peroxide or a hydrogen peroxide activator (tetraacetylethylenediamine), higher pretreatment temperature and longer pretreatment time are selected, so that melanin in the hair is damaged sufficiently, and a better cover effect is realized after dyeing. 本发明公开了种利用天然染料染发的工艺，采用预媒染色工艺或后媒染色工艺对头发进行染色；所述的预媒染色工艺步骤包括预处理、预媒处理和染色步骤，后媒染色工艺步骤包括预处理、染色和后媒处理步骤。染色性能较好的天然染料染发工艺，能够使天然色素顺利通过