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pHFor active dyeing, when the pH value is 7 ~ 9, the color difference between the product is normal, indicating that the pH range has little effect on the product color difference, and the presence of a small amount of alkali will not change or destroy the active dye molecules.When the pH value is 8 Read More
HardnessIt is generally believed that the hardness below 50 ppm has no impact, and 20ppm is already a good water.The water quality of the tube yarn is not the same, but the copper and iron ion content in the water should be paid attention.Usually active dyeing is better below 50ppm. The key is the m Read More
The nature and geometric shape of fiberUnder the same spinning conditions, when the fiber is long, the fiber has a large combination force, and the fiber is not easy to draw from the yarn during friction, which helps the wear resistance of the fabric; the fineness of the fiber is moderate conducive Read More
External factors such as solvents, temperature, dye concentration, electrolytes, and radiation light added to the dyeing solution will cause dyes in the solution, or the state of the dye fabric changes, resulting in changes in the color of the dye. 1. The effect of solvent and mediumThe absorption w Read More
There are many factors that affect the dye dyeing process, mainly including: 1. Dye propertiesThe dye structure and molecular size and shape determine the solubility, diffusionability of dyes, and the height of dyes and fibers. Second, the nature and concentration of the aidThere are many categories Read More
As a kind of spandex elastic fiber, a polymeal polymethyl ester composed of a flexible chain segment and a rigid chain segment. It was successfully studied by Bayer in Germany in 1937. In 1959, it was produced by DuPont. Because it has many advantages and good quality, it is recognized by the peers, Read More
The effect of decentralized dye dyeingThe heat migration of decentralized dyes is not under dry heat conditions, and the dye is redistributed in the two phases of fiber and surface solvents. Instead, its inherent physical characteristics are also caused. EssenceBy analyzing the effects of dyeing tem Read More
There are many reasons for the color difference between samples, and the main reasons are the following aspects.① Be strict and accurate when playing samples. Sample samples are the key to directly affecting the large -scale production of the workshop. We must fully understand its importance and pay Read More
Basic knowledge As a color matching proofing technician, you should have a sufficient understanding of the types and properties of textile fibers and textiles, the selection of corresponding dyes, the basic properties of the selected dyes such as shade, hue, and strength, as well as the dyeing proce Read More
Diffusion test: Accurately weigh 1g of dye, add 100mL of 30°C water, stir evenly with a glass rod, drop 4-5 drops of the dye suspension on the filter paper with a pipette, observe its natural seepage circle, good diffusivity the larger its area.Some dye solutions have 1~2 layers of fuzzy seepage cir Read More
There are many kinds of dyestuffs, but in terms of the physical form of their commodities, they can be divided into solid, liquid and slurry. It can be further divided into:Solid dyes—powder, granular, dust-free powder, block, flake, short column;Liquid dyes—water-soluble liquids and dispersions;Slu Read More
1 Analysis of primary dyesThe original dye analysis mentioned here refers to the testing and analysis of the physical and chemical properties of the original dye for the needs of dye processing. After years of research, it is found that post-processing is by no means a simple physical process. Befor Read More
