They are so named because the dyes actually react with the hydroxyl groups in cellulose to form strong covalent bonds between the dye and the fibre. They offer a full range of bright colours, good to excellent wet fastness properties with minimal colour loss and excellent staining ratings on adjacent white fabrics and moderate light fastness. They offer great versatility in the choice of application methods. However, they have moderate to poor fastness to chlorine, long batch processing times and high dyes and chemical costs.

Warm (60C) Types
Hot (80C) Types
Cold (40C) Types
Wool Reactives