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The textile industry constantly seeks chemicals that can deliver vibrant, durable, and cost-effective coloration. Naphthol AS-KB, identified by CAS number 135-63-7, plays a significant role as a coupling component in the dyeing of various natural fibers. While its primary use is often cited in organic pigment synthesis, its application in the textile sector offers a distinct advantage for manufacturers aiming for high-quality fabric coloration.
Naphthol AS-KB: A Versatile Coupling Component
Naphthol AS-KB belongs to the Naphthol AS series, a group of compounds widely employed in producing azo dyes. In textile dyeing, it functions as a coupling component, reacting with a diazo component to form an insoluble azo dye directly on the fiber. This 'ingrain' dyeing process typically results in excellent wash fastness and good lightfastness, making it a preferred choice for certain applications.
Applications in Fiber Dyeing
Specifically, Naphthol AS-KB is recognized for its effectiveness in dyeing cellulosic fibers such as cotton and viscose, as well as protein fibers like silk. The dyeing process generally involves impregnating the fabric with the Naphthol AS-KB solution (often referred to as 'developing') followed by immersion in a cold solution of the diazotized amine ('coupling'). This sequential application ensures that the dye molecule is formed within the fiber structure, leading to deep shades and good durability.
The recommended dyeing temperature for Naphthol AS-KB on cotton is around 30°C, with an infection temperature of 90°C, suggesting a specific process window for optimal results. This controlled application ensures that the dye is effectively incorporated into the fiber without causing damage or degradation.
Benefits for Textile Manufacturers
For textile manufacturers looking to buy Naphthol AS-KB, the benefits include:
Sourcing Naphthol AS-KB
Finding a reliable supplier for Naphthol AS-KB is key to ensuring consistent dye quality. Manufacturers often seek suppliers who can guarantee high purity (typically ≥98.0%) and provide consistent batch-to-batch quality. When purchasing, inquire about packaging details (e.g., 25kg drums) and recommended storage conditions to maintain product integrity. Businesses can find suppliers and request quotes from reputable manufacturers like NINGBO INNO PHARMCHEM CO.,LTD., which serves as a trusted source for this essential dyeing intermediate. Ensuring a stable supply chain is vital for continuous production runs and meeting market demands.
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1. 20 years of R&D, manufacturing and sales experience, serving customers in 60 countries and regions around the world;
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3. We can satisfy customers' perfect transition from small scale lab requirements (gram level) to commercialization requirements (hundred tons level).
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A: We don't provide free samples due to lots of request and expensive international courier's cost, we can deduct the sample charge after commercial order placed.
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