What is bleach wash for denims?
BLEACH WASH In order to make the clothes have a white or bright appearance and a soft feel, the clothes need to be rinsed. That is, after ordinary washing with clean water, it is heated to 60°C. Add appropriate amount of bleaching agent according to the shade of bleaching color. Make the color consistent with the board within 7-10 minutes. During operation, the direction of adding bleaching agent should be consistent with the direction of rotation of the cylinder. In order to avoid the bleaching agent can not be diluted with water as soon as possible and fall directly on the clothes, causing partial bleaching. Before bleaching, the water level in the tank should be slightly higher so that the bleaching water can be diluted. After the clothes are bleached, the residual bleach in the water is neutralized with Na2CO3 and NaHCO3 to stop the bleaching completely. After the clean water, add detergent, fluorescent brightener, hydrogen peroxide, etc. to the water temperature of 50°C for the final washing. Neutralize PH value, fluorescent whitening, etc. Finally, it can be softened.
Rinsing can be divided into oxygen bleaching and chlorine bleaching. Oxygen bleaching uses the oxidation of hydrogen peroxide at a certain pH and temperature to destroy the dye structure. So as to achieve the purpose of fading and whitening. Generally, the bleached surface will be slightly reddish. Chlorine bleaching uses the oxidation effect of sodium hypochlorite to destroy the dye structure, thereby achieving the purpose of fading. Chlorine bleaching has a rough fading effect and is mostly used for rinsing indigo denim. After bleaching the board, use high waves to neutralize the residual chlorine in the water and clothes to stop the bleaching. Stone grinding after bleaching is called BLEACH STONE WASH.
