"Organic dyes" refers to coloring substances derived from natural sources, like plants or animals, rather than being artificially produced in a laboratory. Full definition
So far, however, such products under development often are made with toxic, expensive organic dyes. (sciencedaily.com)
A cute knitted plush doll toy made of organic cotton, and dyed with metal - free organic dyes. (sckoon.com)
Valchromat is a wood fibre board coloured with organic dyes specifically developed and bonded with resin to ensure that the natural appearance and characteristics of the fibre remain in tact. (dezeen.com)