These natural dyes are completely based on vegetable or (in the case of cochineal red) natural raw materials. The printing inks, also based on natural colours, are made for screenprinting on cellulose fibers such as cotton, linen and hemp. For wool and silk these colours are suitable to only a limited extend. The DIY kits are ready-to-use. The 'raw dyes' are either chopped or ground plant parts or extracts.