Unqualified color fastness

Color fastness includes sun fastness, soap fastness, sweat fastness, friction fastness, sublimation fastness, ironing fastness, etc. The key to these fastness lies in the structural properties of the dyes, which are closely related to fibers, dye concentration, dyeing and finishing processes, external conditions, etc. Therefore, whether the color fastness meets the standard depends on the selection of dyes, followed by the application of dyeing processes and additives.

When formulating the dyeing process, it is necessary to reasonably determine based on the dye, fiber, and customer indicators, so that the dye, with the help of auxiliary agents, can dye the fiber as firmly as possible under certain conditions, making it fully fixed. For auxiliary agents, one is to choose good leveling and promoting agents to make the dye slowly, evenly, and fully dye the fiber; The second is to add chelating agents to overcome the floating color caused by the complexation of dyes with metal ions in water, and reduce the hydrolysis of reactive dyes in water; Thirdly, choose excellent soap detergent to remove floating colors and prevent them from contaminating the fabric again; The fourth is to choose appropriate fixing agents. Currently, there is no ideal fixing agent for sublimation fastness, sun fastness, etc. There are excellent fixing agents available for various indicators such as soap washing fastness, sweat fastness, friction fastness, etc.