All the dyes are organic dyes. Only the pigment will have a mineral variety. The type of organic dyes, and more you can not imagine, thousands of even more! You are talking about these two, only two of the basic dyes in the dye. There are dozens of basic dyes. Moreover, the basic dye is only the largest variety of all kinds of dyes in a class. Specifically, the organic dyes generally have the following categories, each category, ranging from dozens of species, as many as hundreds: direct dye acid dyes weak acid dyes neutral dyes disperse dyes metal complex dyes reduction dyes oxidative dyes Sulfide dyes Basic dyes Reactive dyes
Methylene blue can give hemp, silk, paper stains. Biology is also used as a bacterial or cell stain. But because of its easy oxidation, dyeing results should not be long-term preservation. It can form Wright's staim with acid dye yellow Ehong (Eostm Y).
