Reactive Remozal - Dyes & Printing
Reactive Remazol dyes are a class of reactive dyes known for their ability to form covalent bonds with textile fibers, resulting in excellent colorfastness. The reactive group in these dyes is typically a vinyl sulfone group, which, under alkaline conditions, reacts with hydroxyl groups in cellulose fibers to form strong ether bonds.
Applications
Reactive Remazol dyes are predominantly used in the textile industry for dyeing and printing cellulosic fibers such as cotton, rayon, and linen. They are also suitable for dyeing wool and silk. Beyond textiles, these dyes find applications in:
Paper Industry: Used for coloring paper products.
Leather Industry: Employed in dyeing leather goods.
Textile Industry: Utilized in textile industry materials materials.
Dyeing Process:
Preparation: The fabric is thoroughly cleaned to remove impurities, ensuring optimal dye uptake.
Dye Bath Preparation: Reactive Remazol dye is dissolved in water to create the dye bath. Sodium carbonate or another alkali is added to achieve the necessary pH for the reaction.
Dyeing: The fabric is immersed in the dye bath at a temperature of approximately 60°C. The vinyl sulfone groups in the dye react with the hydroxyl groups in the cellulose fibers, forming covalent bonds.
Rinsing and Washing: After dyeing, the fabric is rinsed to remove unfixed dye molecules. A soaping agent may be used to enhance the removal of any hydrolyzed dye, ensuring excellent wash fastness
Safety Precautions
In case of fire, use sand or fire extinguisher with abundant quantities of water to dissolve the powder and dissipate heat. When possible, product should be spread out before water is used. In case of contact with eyes and/or skin, flush thoroughly with water. Water in large quantity is the only effective extinguishing agent.