colorant

The natural haematochrome extracted from plum skin is a kind of safe and non - poisonous colorant.

从李子皮中提取的天然红素是一种安全无毒的素。

If the hair graying is inreversible, hair colorant is the main choice for the masking of hair color change.

在无法逆转头发灰的情况下，着剂是恢复头发颜的主要法。

This article describes the use of organic colorants as the optical recording media, such as polymethine cyanine, phthalocyanine, naphthocquinone and photochromic compounds.

介绍了作学记录介质的有机染料,如多甲川菁、酞菁、荼醌以化合物等。