Color correction technology

For fabrics with slight color difference, the following methods can be used: when the absorption rate decreases and there is a large amount of dye remaining in the residual solution, the dyeing time can be extended or the dyeing temperature can be increased to adjust. When the dyeing depth is slightly higher, this color difference can also be corrected by adding surfactants to level the dyeing:
1.1 Methods of color correction
Before correcting the color light, it is necessary to have a thorough understanding of the color of the dyed fabric and the properties of the dye solution.
The following methods can be used for color correction:
(1) It is not necessary to remove the dyed material from the dyeing vat. Simply cool the dye solution to 50-70 ℃ and add a properly prepared dye for color correction; Then heat up and dye.
(2) The dyed fabric is unloaded from the dyeing machine and then fed into another dyeing machine for color correction processing using boiling dyeing and guide dyeing methods.
1.2 Properties of color correction dyes
Dyes for color correction are recommended to have the following properties:
(1) Dyes are not affected by surfactants and become slow dyeing. During the color correction operation, a large amount of anionic surfactants contained in the dye remain in the dye solution. A small amount of dye used for color correction will form a slow dyeing effect due to the presence of surfactants. Therefore, when using dyes for color correction, it is necessary to choose those that are not easily affected by surfactants and have a slow dyeing effect.
(2) Stable dyes that are not easily affected by hydrolysis and reduction decomposition. Dyes used for color correction are easily hydrolyzed or reduced when applied to very light tone color correction. Therefore, it is necessary to choose dyes that are not affected by these factors.
(3) Dyes with good levelness. Good leveling ability is required to achieve leveling effect.
(4) Dyes with excellent sun fastness. Dyes used for color correction are usually used in small quantities.

Therefore, its sublimation fastness and wet fastness are quite important, but not as urgent as its resistance to sunlight. Usually, the dyes used for color correction are selected from the dyes used in the original dyeing formula. However, sometimes these dyes may not meet the above conditions. In this case, it is recommended to choose the following dyes that are suitable for color correction: C I. (Dye Index): Disperse Yellow 46; Disperse Red 06; Disperse Red 146; Disperse purple 25; Disperse purple 23; Disperse Blue 56.