The industry of dyes is very good, because of the more benefits for the enterprise when used, so it is favored by the customers, in order to make you more familiar with it, the next step is to talk about some of the relevant information of the dyes? I hope to bring help to more people.

Nowadays there are still a lot of people who do not know some basic information about dyes, so as a manufacturer, it is also necessary for us to briefly explain that suede occupies a certain proportion in the modern industry. Because suede is not a finished product, the color of suede should be even, full of color and pure tone. For frontal leathers, there is a trend towards heavy dyeing and light coating. Of course at this time, we should know is that this undoubtedly puts higher requirements on the dyeing. Reasonable use of additives, help to improve the effect, but also can reduce the production process, save the amount of dyestuff, reduce the chromaticity of dyeing waste liquid. Dyeing auxiliaries can be divided into leveling agent, color enhancer and color fixing agent according to their functions. In addition, mainly due to the difference of leather parts, the physical and chemical process of dyeing is complicated, and it is easy to cause uneven coloring of leather. In order to improve the uniformity of dyeing and the permeability of dyestuff in it, often add leveling agent to achieve the purpose of leveling.

Leveling of dyes is generally achieved by slowing down the contact between the dye and the leather (i.e. slow dyeing), or by moving the dyed dye from the darker part to the lighter part (i.e. transfer dyeing). There are two main types of leveling agents. One is that they have a strong affinity for collagen fibers. Also, it is important to know that they are first used to retard the uptake of the dye by their adsorption to the collagen fibers. For example, the diffusing agent NNO retards the uptake of anionic dyes. Another class has a certain affinity for dyes, first polymerization with dyes, delaying the interaction between dyes and leather, such as surface and OP series of surfactants, belonging to the polyoxyethylene ether. Of course need to know is a great affinity for molecules. This dye added to the dye solution so that the molecules are difficult to combine with the leather collagen fibers quickly, thus slowing down the speed of dyeing.