Reverse cycle, the dye around the loop to the center is bound to cause Custom Racing Flags hank upper density is getting smaller and smaller, lower density, more and more, forming the flow short circuit, the dyeing of yarn core through to generate the white core. white spots and light spots. Table 2-9 for the yarn dyeing process of the vat dyes.
Before yarn dyeing, the first white silk quality inspection requirements of white silk appearance are clean and free of stains, neutral, stacked time shall not exceed 8h, and cover with a damp cloth. The installed capacity of yarn dyeing, should be based on different yarn dyeing equipment required for filling, dyeing flaws prevent improper yarn filling.
Third, sulfur dyes yarn dyeing Custom Racing Flags
Dark varieties, such as yarn-dyed cotton denim, Yuan Gong dyed yarns, most of the sulfur dyes. The sulfur dyes are cheap, stained color, plump, good fastness to washing is one of the commonly used dyes for yarn dyeing.
Sulfur dyes because of its molecular structure contains more sulfur is insoluble in water, staining by sodium sulfide dissolved. In recent years, there are water-soluble sulfur dyes and anti-brittle damage Sulphur Black, the application of sulfur dyes, there has been new prospects. Custom Racing Flags
(A) of the dyeing process points of yarn dyed before processing to ensure the quality of yarn dyeing. Sulfur dyes dyeing with or without light and mercerized points, individual light-colored dye yarn needs to be bleached. Scouring poor, uneven yarn capillary effect of the backward, or mercerizing lye concentration, Discount Decorative House Flags bleached yarn chlorine more so on will directly affect the staining quality. Before transfection on white silk, carefully check the required uniform Custom Racing Flags whiteness, there can be macular, dark spots, alkali spots, rust, stains and chlorine, etc. Dehydration of white gauze covered with a damp cloth to prevent surface air-dried, piled up over the long white, before transfection, then washed once, otherwise the dye will produce local IOUs or light color defect.
Not only clear boiled practice matt yarn by alkali cooking, due to the cotton grease, waxes yet to go to make piling up time should not be too long, Buy Cheap Garden Flags especially in the hot season is perishable, to be re-before transfection with 80 ~
Sulfur dyes on the dye slowly, it is suitable for high temperature dyeing is conducive to the dye particles melt constantly thinning, rapid penetration to the fiber inner and diffusion, but also make the fiber yarn heat extruded loose, good leveling effect. General sulfur dyes dyeing temperature is roughly 75 ~ 80 ° C, the inconvenience to the operation of the manual yarn dyeing high temperature, the temperature controlled at 60 ~
When sulfur dyes dyed dark, the dye bath dye concentration, the oxidation rate after the dyeing, the yarn is not fixing the dye and exposed to the air to produce color lakes was adsorbed on the surface of the dyed yarn, likely to cause the red stripe, gold copper and other defects, decreased color fastness. In order to obtain better leveling Wind Flags Advertising effect and color fastness, the general staining method will remove the yarn in the dye bath immediately re-immersed in another in the solution of re-restore, Custom Racing Flags and gradually reduce the the Sesha temperature and the adsorption dye concentration, slow down the oxidation rate, to achieve uniform color and stable quality, or through the liquid to remove part of the dyed yarn surface floating color, this process often referred to as boring cylinder.