By Baico Biotech 丨 Denim Washing 丨 Baico Biothch-Arpina

When it comes to denim garments, we always associate them with distinctive appearance and stylish look. Nevertheless, conventional denim has inherent drawbacks. Raw denim grey fabric contains sizing agents and surface loose fibres. Untreated denim garments feel stiff, offer poor wearing comfort and tend to cause skin abrasion. Conventional denim washing mainly relies on pumice stones. However, the pumice stone washing process easily damages denim. Moreover, washed denim garments are prone to stiffness and deformation, greatly shortening their service life.

With the upgrading of washing technology, the emergence of bio-stone washing process addresses the disadvantages of conventional washing, enabling denim to deliver both stylish appearance and soft comfort. BBT has developed NEF®2200+ and NEF®2100+ coated granular neutral cellulases specially for denim washing. Featuring excellent stability and capability to generate grey shade tone and blue shade tone, they enjoy greatprocess compatibility and are widely adopted for denim abrasion effects. These two enzyme series maintains good stability at low temperatures ranging from 30℃ to 50℃, breaking the limitation of high-temperature operation required in conventional washing.

During the bio-stone washing process, the enzymes precisely target loose fibres on the denim surface. Under mild conditions, they break down and remove surface fuzz, softening the fabric and delivering superior wearing comfort. Compared with conventional pumice stone washing, bio-stone washing replaces pumice stones with enzymes for gentler treatment, eliminating the common problems of stiff, rough and easily deformed denim fabric caused by conventional processes.

Bio-stone washing safeguards the quality of denim fabrics. Meanwhile, it breaks the temperature limitations of conventional washing. The enzymes can maintain stable activity under low-temperature conditions without high-temperature treatment, cutting energy consumption during the process. The whole process is low-consumption and high-efficiency. It retains denim’s classic fashionable silhouette while achievingcomprehensive improvements in fabric softness and smoothness. It is a cost-effective solution for denim washing mills to reduce costs while guaranteeing product quality.

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