6:06 PM
The dyes are finely ground in the presence of a dispersing agent and sold as a paste, or spraydried and sold as a powder. Their main use is to dye polyester, but they can also be used to dye nylon, cellulose triacetate, and acrylic fibers. In some cases, a dyeing temperature of 130 °C (266 °F) is required, and a pressurized dyebath is used. The very fine particle size gives a large surface area that aids dissolution …
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Thursday, December 31, 2020