Reactive dyes is the worldwide most used dyes for dyeing cotton. Fastness of color is excellent to good in most of the case. Amine-reactive dyes are widely used to modify proteins, peptides, ligands, synthetic oligonucleotides and other biomolecules. Reactive dyes are the absolute best type of dyes made for fabrics or fibers made from plant materials. Plant materials means anything made from a plant including; Cotton, Linen, Rayon, Hemp, Bamboo, Paper, Jute, etc. The dyes also work well on silk. These dyes are not made for nylon or wool, and they don't work at all on polyester. Our dyes are considered to be "cold water dyes" which in the world of dyes really means warm water, but the dyes do not need to be heated to be used. Reactive dyes are best for cottons or other plant materials because they are very color fast and wash fast. The dye attaches itself to the fabric via a chemical reaction where the dye actually becomes part of the fabric. Once the fabric is correctly dyed, and once the loose dye that didn't fix to the fabric is washed away, no more dye will bleed out of the fabric. Once all loose dye is removed, the dyed fabric can accidentally be washed with a load of white laundry and the dye will not come off and stain the laundry. Our dyes are used by dyers all over the world. Our customers use our dye in many ways. Tie dye, batik, solid color, patterns, and textures can all be achieved using our dyes in different ways. See our instruction tab for different ways are dyes can be used. Reactive dyes are mainly used for dyeing cellulose fibres such as cotton and viscose, but they are also increasingly gaining importance for wool and polyamide. Manufacturers of Disperse and reactive dyes and a vide range of Textile Auxillaries, chemicals such as leveling agents, due carriers, dispersing agents etc.