A Safer Denim Desizing Technology by BBT Enzyme Amylase Technology

By Baico Biotech 丨 Denim Washing 丨 Baico Bioch-Arpina

Starch sizing is applied to denim grey fabrics during weaving to enhance yarn strength. As a critical pre-washing process, desizing directly determines the final effects of subsequent whiskering and Bio-stonewashing. BBT proudly launches ALCHEMY®A16L desizing amylase, engineered specifically for denim desizing processes in the textile industry, driving the transformation of denim washing procedures toward lower-consumption production.

BBT Enzyme Amylase ALCHEMY®A16L featuresa broad effective temperature range of 60–110℃ without standing enzymatic stability and excellent process compatibility. At 60℃, complete desizing of denim fabrics can be efficiently achieved within only 10minutes, greatly shortening the production cycle. There is an essential difference in mechanism when compared with conventional caustic soda-based chemical desizing: the conventional process relies on strong alkaline agentssuch as caustic soda to swell and strip starch size on fabric surfaces via physical swelling. In contrast, ALCHEMY®A16L amylase leverages the specificity of biocatalysis to selectively break down large starch molecules on denim into soluble small molecular fragments, which can then be easily washed off.

From the perspective of production safety, the amylase process boasts prominent advantages. Strong alkaline chemicals such as caustic soda are highly corrosive. Long-term exposure may cause damage tooperators’ skin and respiratory tracts. In comparison,amylase is a biological agent that can be naturally biodegraded. It generates a lower pollutant load in wastewater and effectively reduces factories’ pressure on safe production as well as wastewater treatment costs.

Temperature control is a core element of cost management for printing and dyeing mills. Conventional desizing processes usually require continuously elevated temperatures. High-temperature conditions not only increase operational risks in workshops, but also consume large volumes of steam, driving up production energy costs. The key advantage of amylse ALCHEMY®A16L lies in its capability to achieve efficient desizing stably at a low temperature of 60℃ without continuous high-temperature heating. While ensuring thorough desizing performance, it drasticallycuts energy consumption and enables washing plants to realize dual control over production safety and manufacturing costs. Meanwhile, the mild enzymatic treatment will not damage the fiber structure of denim, preserving fabric tensile strength and delivering more uniform and stable color effects in subsequent bio-stonewashing and whitening processes. With multiple merits including low-temperature safety and environmental friendliness, ALCHEMY®A16L serves as an optimal solution for denim washing mills to replace conventional chemical desizing and build sustainable washing processes.

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