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Procion is a brand of fibre reactive dyes. They are commonly used in tie dye and other textile crafts. They are dichlorotriazine dyes and were originally made by Imperial Chemical Industries. The brand name is now owned by Dystar, but, since the patent on the dyes has expired, many manufacturers around the world now make them. [1]
In a reactive dye, a chromophore (an atom or group whose presence is responsible for the colour of a compound) contains a substituent that reacts with the substrate. Reactive dyes have good fastness properties owing to the covalent bonding that occurs during dyeing. Reactive dyeing is the most important method for coloring cellulose fibers.
reactive dye Reactive dyes are a class of synthetic dyes that first appeared commercially in 1956, after their invention in 1954 by Rattee and Stephens at the Imperial Chemical Industries Dyestuffs Division site in the United Kingdom. Reactive dyes are used primarily to dye natural fibers and cellulose fibers such as rayon. [39] resist dyeing
Colour fastness is the property of dyes and it is directly proportional to the binding force between photochromic dye and the fibre. The colour fastness may also be affected by processing techniques and choice of chemicals and auxiliaries. [1] [2] The term is usually used in the context of clothes.
Subsequent oxidation reforms the original insoluble dye. The color of denim is due to indigo, the original vat dye. Reactive dyes utilize a chromophore attached to a substituent that is capable of directly reacting with the fiber substrate. The covalent bonds that attach reactive dye to natural fibers make them among the most permanent of dyes.
Stripping reactive dyes with ozone is an alternative technique that replaces traditional chemicals, offering a more ecologically sound approach. [12] The resulting wastewater from the ozone stripping process demonstrates a significantly diminished chemical oxygen demand—approximately 97% lower than the effluent produced by conventional ...