What are the raw materials for leather coloring?
Throughout the dyeing process, adsorption, diffusion, penetration and fixation are interrelated and alternating. The dyeing process involves a wide range of factors, in addition to the various components of the dye composition, Before and after the process of cooperation and other factors are very important.
The uniformity of the dyeing of the suede fiber is greatly affected by dyeing. Buttocks are more close to the fiber, the edge of the fiber is more loose parts, usually produce close to the dye surface of the dye more, the color is deep; loose parts of the dye penetration, the phenomenon of light color.
Neutralization "can reduce the positive charge on the surface of chrome tanned leather, which is beneficial to the infiltration of anionic dyes.When the deep pH of the leather is consistent with the surface, the dyes can be fully infiltrated and slowly combined to meet the transdermal requirements.Therefore, We have strengthened the neutralization, so that the leather incision and all through, control and pH value of not more than 5.5
To make the leather through, you must make the dye fully penetrate into the deep leather, so that deep fiber coloring, which requires dyeing conditions should be conducive to dye penetration, and dyeing the state before the leather is a very important factor, And "the degree of control is to determine the status of the main factors of leather.
Leather dyeing is a complex physical and chemical process, is the dye molecules on the leather fiber penetration and bonding process, is the physical and chemical effects of the total effect.
