Underwear lace dyeing principle and color fastness standards, dyeing is the fiber material dyeing color process.It is the use of dyes and fibers to occur physicochemical or chemical binding, or chemical methods to produce dyes on the fibers to make the entire textile into a colored object.Staining products not only require uniform color, but also must have a good dyeing fastness.
First, an overview of dyeing theory
The fiber is immersed in a dye aqueous solution at a certain temperature, the dye moves from the water phase to the fiber, at which point the amount of dye in the water gradually decreases, after a period of time, it reaches equilibrium.The less dye in the water is the dye that moves toward the fiber.The phenomenon of this dye binding in fibers is called dyeing.
Second, the dyeing process, can be roughly divided into three basic stages:
1. Adsorption: When the fiber is put into the dye bath, the dye first spreads to the fiber surface, and then gradually transfers from the solution to the fiber surface, a process called adsorption.
2. Diffusion: The dye adsorbed on the surface of the fiber spreads to the inside of the fiber until the dye concentration of each part of the fiber tends to be consistent.
3. Solid: is the process of dye and fiber binding, with dyes and fibers, its binding methods are also different.
Third, dyeing fastness dyeing fastness refers to the ability of dyeing fabrics to maintain the original color state under the influence of various external factors during use or in the process of later processing.
Staining fastness is multi-faceted, generally more important include: sun, soap washing, sweat stains, friction, brushing, ironing, smoke and other fastness.