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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.
It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2]
Reactive dye printing is a method of printing fabrics using reactive dye incorporated into a paste or wax including components such as sodium alginate gum, soda ash, urea and kerosin. Typically, the dye is dried at 130 degrees and cured at 180 degrees to permanently bond it, and the fabric later treated with a softener for better hand feel.
Colour fastness is a term—used in the dyeing of textile materials—that characterizes a material's colour's resistance to fading or running.Colour fastness is the property of dyes and it is directly proportional to the binding force between photochromic dye and the fibre.
Discharge agents are used to bleach color from the previously dyed fabrics and can be used as a reverse tie-dye, where the application of the agent results in loss of color rather than its application. Household bleach (sodium hypochlorite) can be used to discharge fiber-reactive dyes on bleach-resistant fibers such as cotton or hemp, but not ...
For an example by applying salt and alkali treatment at a temperature of 95 degrees Celsius, a reduction in dye of 20–40% can be achieved in reactive dyed materials. This occurs due to the hydrolysis of the dye fiber bond. [7] This process is generally less aggressive and aims to color correction. [5] [6] [2]
Structure Range Category Nitroso: 10000–10299 Nitro: 10300–10999 Monoazo: 11000–19999 Category:Azo dyes: Diazo: 20000–29999 Category:Azo dyes: Triazo
Color chips or color samples from a plastic pellet manufacturer that enables customers to evaluate the color range as molded objects to see final effects. A color chart or color reference card is a flat, physical object that has many different color samples present. They can be available as a single-page chart, or in the form of swatchbooks or ...