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Choice of textile Dyes
2018/03/09
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The color fastness of a product, the choice of dye material is very important. If the dye choice is not suitable, good additives, good dyeing process, there is no way to dye high quality color fastness. Only when the appropriate dye is selected can we talk about the next question.
1. Select the dye according to the characteristics of the fiber:
2. Select the dye according to the color:
3. Dyeing rate of dye to fiber:
4. Good compatibility between dyes:
5, try to reduce the dye required only a few:
6. Select the dye according to the color fastness of the dye:
1. Select the dye according to the characteristics of the fiber:
Different kinds of dyes and fibers have different combinations, and the bonding strength is different. After the dye type was determined, the dye with high dyeing performance was selected. For instance, when dyed wool fabric, is also a strong acid dyes, domestic imports would probably be strongly acidic dye dyeing performance is good, color is not good, not only the combination of strong degree is inferior to the latter; Or the same is domestic strong acid dyestuff, different dyestuff and wool union fastness and dyeing bright degree is also different. For example, the color fastness of dyeing wool yarn with weak acid dyes is higher than that of strong acid dyes; And pure cotton fabric or regenerated cellulose fiber fabric, can be used either directly or reactive dyes; In addition to the weak acid dyes and some reactive dyes, the silk fabrics can also be used for individual direct dyes.
2. Select the dye according to the color:
After determining the main types of dyes, it is necessary to further determine which dyes to use according to the color and depth of the dye. First, try to choose the dye that is close to the desired color, if there is deviation, then use other dyes to color; Second, look at the color fastness index of the selected dye. The color fastness of the dye is poor, and the color fastness can be improved by the process. Third, the saturation of dye dye can achieve the desired color depth. If the dye with low dye rate is selected, the combination of the dye will not be firm and will fall off in the process of use or reprocessing, even if the desired high depth color can be achieved temporarily after processing.
3. Dyeing rate of dye to fiber:
Different dyes can present different dyeing rates, and in different dyeing conditions, the dyeing rate of the same dye is different. So to consider when choosing the dye uptake rate, otherwise there will be a race between dye dyeing phenomenon, that is one of the dye fiber dyeing position ahead of the other dye dyeing only on the surface of fiber, not even with the combination of fiber form strong bond, thus in the process or daily use is first destroy. This is why some colors fade and appear to be completely different from the original color. Therefore, it is necessary to choose the dye which is similar to the dyeing rate under the same condition, which is very beneficial to the next step.
4. Good compatibility between dyes:
Different dyes in the same kind of dyes have different compatibility, and the greater the compatibility value, the better the ability of the dyes to match each other. There must be a good compatibility between the colored dyes. It is best to use three primary colors for difficult colors. The three primary colors are the best compatibility of each type of dye, and also the most complete and positive three dyes. Therefore, some of the more difficult to dye the strange color to use the three primary colors to match colors, try not to use other dyestuff hard, easy to show the phenomenon of race dyeing, easy to dye flowers.
5, try to reduce the dye required only a few:
Choose dye is, first of all should choose color close to the color of dye, and then use one or two you lack dyestuff to supplement the main color, and should choose color dye belonging to same quality is, so that the color of the dye is pure, bright and clean, bright and full. Try not to use four or five dyes to color, it is both bad toning, and operate a large number of dyeing. And while on the color, but the color is not bright, the dye is not full, the dye is not fully combined with fiber, resulting in poor color fastness.
6. Select the dye according to the color fastness of the dye:
In the introduction of each dye, the dyeing fastness of the dye is introduced. When choosing a dye, it is necessary to choose the dye according to the color fastness of the product requirement, and the dyeing fastness of the dye is similar. For example, the dyeing fastness of the dye itself can only reach 2~3 levels, or even 1~2 grade, and the good additives and dyeing process cannot dye the product of 4-5 staining fastness. Because, dye color fastness mainly depended on dye and bonding force between fibers, if the combination between the two key is not strong, how can make them for the combination of the strong force, even after fixation has improved, also giving external factors such as washing, friction damage.
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