| 摘要 |
<p>Disclosed is a natural hair dye composition made of the following raw materials by weight percentage: natural melanin 22-25%, Polygonum multiflorum 14-16.5%, Rhizoma zingiberis 14-16.5%, Bletilla striata 14-16.5%, Indigo naturalis 7-11%, Rhizoma nardostachyos 7-11%, honeycomb extract 1.5-5.5%, and carbonaceous molecular sieve 0.6-1.1%. The preparation method of the natural hair dye comprises the following steps: (a) mixing the dry raw materials in proportion and then grinding with a colloid mill; (b) dynamically extracting under ultrasonic microwaves; (c) further grinding with the colloid mill; (d) concentrating under reduced pressure in a vacuum or freeze drying at the critical point; and (e) filtering by a vacuum supersonic wave to obtain the product.</p> |
