By Baico Biotech 丨 Textile Enzyme 丨 BIO-SCOURING ENZYME 丨 BBT-HK-Kathleen

In printing and dyeing production, bleaching constitutes an indispensable procedure in pre-treatment. Its necessity originates from the inherent properties of textile fibers. Take widely applied cotton fiber as an example. Raw cotton contains cotton wax, cottonseed hulls and naturally occurring yellow-brown pigments, rendering grey fabrics beige or off-white rather than pure white. Without bleaching, inherent background pigments will blend with dyes, resulting in dull, lifeless finished hues and uneven dyeing. Furthermore, such fabrics fail to meet the whiteness standards required for white textiles or pale-colored fabrics. Consequently, bleaching is essential to eliminate pigments and purify fibers, providing clean, hydrophilic substrates for subsequent dyeing processes.

In practical manufacturing, bleaching generally adopts caustic soda combined with hydrogen peroxide along with peroxide stabilizers. Hydrogen peroxide serves as the primary bleaching agent yet remains highly stable with negligible bleaching capacity under acidic or neutral conditions. Once caustic soda is added to alkalize the bath solution, hydrogen peroxide dissociates into strongly oxidizing hydroperoxide ions (HO₂ ^-) that disrupt the chemical structure of pigment chromophores and achieve whitening. Under alkaline circumstances, wax and pectin on cotton fiber surfaces undergo saponification and swelling, facilitating deeper penetration of hydrogen peroxide into fiber interiors. Meanwhile, an alkaline environment passivates metallic ions such as iron and copper present in water, restraining intensive catalytic decomposition of hydrogen peroxide and preventing excessive fiber deterioration.

Nevertheless, extensive caustic soda usage carries notable drawbacks. High-temperature strong alkaline environments inflict chemical damage on cellulose, decreasing fiber tensile strength and aggravating fabric weight loss. Additionally, massive volumes of clean water are required to remove residual alkali, raising energy consumption and wastewater disposal burdens.

Baico biotech (BBT) is textile enzyme and household detergent enzyme manufacturer in China.To address these challenges, BBT has developed Bio-scouring enzyme. During water bath heating, it efficiently decomposes pectin without prolonged heat preservation or conventional alkali-based scouring, drastically improving fabric absorbency. Compared with conventional processes, fabrics treated with BBT Bio-scouring enzyme allow reduced caustic soda dosage in subsequent bleaching while maintaining identical whiteness under consistent bleaching temperature, duration and hydrogen peroxide dosage. Cutting caustic soda application alleviates chemical fiber damage and fabric weight loss, lowers alkalinity and COD in wastewater, and substantially eases wastewater treatment pressures.

In conclusion, BBT ENZYMES are a biological solutions.Developed to enhance the dyeing effect of fabrics.BBT Bio-scouring enzyme mildly removes pectin prior to bleaching, enabling caustic soda reduction whilst preserving fabric whiteness. This technology mitigates fiber damage and wastewater treatment costs, curbs water and energy consumption during pre-treatment, and com plies with clean production standards. More importantly, bio-enzyme technology presents printing and dyeing manufacturers with a practical solution balancing product quality and environmental protection. It helps the industry reduce reliance on heavy chemical agents and advances the low-carbon, sustainable transformation of printing an d dyeing manufacturing. 

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