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Direct dye dyeing of cotton knitted fabric1. The characteristics of direct dyes1. Direct dyes are water-soluble dyes that can directly dye cellulose fibers in a neutral dye bath.2. Complete direct dye chromatogram, convenient application, low price, poor washing fastness, and poor light fastness. Of Read More
Temperature effect and salt effect of direct dyeing(1) Temperature effectTemperature has different effects on the dyeing rate of direct dyesThe structure is relatively simple, easy to dissolve, low affinity to fibers, and high diffusion rate.The structure is relatively complex, difficult to dissolve Read More
The influence of temperature on the dyeing performance of direct dyesThe influence of temperature on the dyeing performance of different dyes is different.1. For direct dyes with high dyeing rate and good diffusion performance, the darkest color will be obtained at 60-70℃, but the dyeing rate will d Read More
Detailed introduction about direct dyesDirect dyes are dyes that can be heated and boiled in neutral and weak bond phase media without the help of mordants. Direct dyes are formed by the hydrogen bonding van der Waals force between the direct dye and cotton fiber. Mainly used in fiber, silk, cotton Read More