When we use cationic dyes for dyeing, many factors will affect the dyeing effect.

Therefore, in order to ensure the dyeing effect, we need to pay attention to these aspects. Let’s take a look at the three factors that affect the dyeing effect of cationic dyes.

1. Temperature
Temperature is an important factor to control level dyeing. When acrylic fiber is dyed with cationic dyes, the dye uptake rate increases rapidly when the dyeing temperature reaches the glass transition temperature (75-85 ℃). Therefore, when the dyeing temperature reaches the glass transition temperature of the fiber, the temperature should be increased slowly, generally 1 ℃ every 2 ~ 4 minutes. It can also be dyed at 85 ~ 90 ℃ for a period of time, and then continue to heat up to boiling.

2. PH value of dyeing bath

3. Electrolyte
Adding electrolytes, such as sodium sulphate and salt, to the dyeing bath can reduce the dyeing rate of cationic dyes and have a retarding effect. The electrolyte has no obvious retarding effect on the dyes with K value of 1~1.5, but has retarding effect on the dyes with K value of 3~5. The retarding effect of electrolyte decreased with the increase of dyeing temperature. When dyeing light color, the amount of electrolyte can be higher, about 5% ~ 10% (o.w.f.), but no need to add when dyeing dark color.

Specializing in producing cationic dyes for more than 20 yeare, we are very familiar with cationic dyes performance, such as cationic red X-GRL, cationic golden yellow X-GL, cationic pink X-FG, cationic red X-GRL, cationic red 3R, cationic turquoise blue X-GB.Welcome contact us for latest price list.

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