Azo dye, found in blue jeans ... but the potential link to cancer warrants further study. Organic compounds called NPEs lurk in many clothes. Of the more than 140 clothing samples that Greenpeace ...

Natural dyes may stain your clothes, hands and surfaces so be careful and get permission from a grown-up first. Use the colour chart to help you decide which colour, or colours you’d like to make.

These experimental colours could one day adorn the clothes you wear if they pass ... explains the resulting product is a natural dye, adding, “we use a genetically modified (GM) process to ...