Enzymes have become one of the most useful tools in modern textile wet processing. They work under mild conditions, target specific substances on the fibre and help mills cut water, energy and harsh chemical use. For dyehouses and finishing plants, knowing which enzyme to use at which stage makes a real difference in quality and cost.
Desizing with amylase
Woven cotton fabrics usually carry starch-based size from weaving. Amylase enzymes break this starch down into soluble sugars that rinse away easily. Compared with oxidative or acid desizing, enzymatic desizing is gentler on the cotton and gives more even absorbency before scouring and dyeing.
Bio-scouring with pectinase
Raw cotton contains pectins and waxes that make it water-repellent. Pectinase-based bio-scouring removes these impurities at lower temperatures and near-neutral pH, reducing the need for strong caustic soda and lowering weight loss.
Peroxide killing with catalase
After hydrogen peroxide bleaching, residual peroxide can damage reactive dyes and cause shade problems. Catalase enzymes decompose the leftover peroxide into water and oxygen within minutes, so dyeing can start in the same bath with fewer rinses.
Biopolishing and denim finishing with cellulase
Cellulase enzymes remove protruding microfibres from cotton and viscose surfaces, giving here a cleaner look, softer handle and better pilling resistance. In denim and garment washing, neutral and acid cellulases create the worn, stone-washed effect without pumice stones, while laccase systems are used for indigo bleaching effects.
Getting the conditions right
Every enzyme has an optimum pH, temperature and time range. Water hardness, wetting agents and sequestering agents in the same bath also affect performance, so enzymes are usually selected together with compatible textile auxiliary chemicals such as wetting agents, anti-creasing agents and softeners.
Choosing a supplier
Mills that work with a single manufacturer for enzymes and auxiliaries can test complete process recipes rather than isolated products. Turkish producers such as Derin Kimya in Istanbul offer full ranges of textile enzymes, wetting agents, sequestrants and finishing softeners, together with technical data sheets and samples for lab trials.