The task of garment dyeing is not only to obtain the color and good color fastness required by customers, but also to have a good level dyeing effect. The so-called level dyeing means that the dye should be evenly distributed in all parts of the garment. This uniform distribution includes the uniformity of each part of the surface of the dyed object and the uniform distribution of the dye in the fiber. There are many reasons for uneven dyeing, but there are mainly the following important reasons:
1. The unevenness of the dyed object The unevenness of the dyed object itself is caused by many different reasons: for example, the dyeing performance of cotton fibers is often different due to different maturity, and the dyeing of wool is also different due to different varieties, regions, and parts. Are not the same. Partial contamination of the dyed object with other substances, such as unclean water, local oil stains, etc. will also cause uneven dyeing.
2. Uneven dyeing caused by dyeing conditions and improper dyeing operations
1. If the water-soluble dye is not well dissolved in the dye solution, if the water-soluble dye is not well dispersed in the dye solution, and if the dye solution is unstable, it may cause uneven dyeing, resulting in color spots, light colors and other diseases.
2. During dyeing, the concentration of dyes and auxiliaries contained in each part of the dyeing solution are inconsistent, resulting in uneven dyeing.
3. During dyeing, the temperature of each part of the dyeing solution is inconsistent, resulting in uneven dyeing. Because the temperature directly affects the dyeing rate and percentage of dyeing.
4. The initial dyeing temperature and heating rate also affect the uniformity of dyeing. If the initial dyeing temperature is too high, the heating rate is too fast and extremely fast, which will easily cause uneven dyeing.
5. The dyeing temperature is too low or the dyeing time is not enough, resulting in uneven dyeing or light color.
3. The performance of the dye itself
The fiber of the dye has high affinity and fast dyeing rate, but the diffusion performance is poor, and it is easy to cause uneven dyeing.
Post time: Dec-01-2022
