More about dyeing problems and choose proper dyeing auxiliaries

We have talked about some common quality question in the process of dyeing, and here let's see more dyeing problems, and better understand how to choose the right dyeing auxiliary in the dyeing process.
dyeing color defect
1. Color defect.
Color defect is the most common quality defect. The reason that cause it is as follows:
(1) the process and operation problem: the improper process and the wrong operation causes color defect.

(2) the equipment problem: the non-uniform temperature in the dry machine of the heat-set machine causes dolor defect. And the insufficient pump force of the rope dyeing machine also can cause color defect.

(3) Dye problem: if the dye concentrate and the solubility become bad, compatibility will become bad . It will become sensitive to the temperature and Ph value. and the color defect will occur. Such as, positive emerald blue HN-R is more likely to cause color defect.

(4) Poor water quality
The metal icon in the poor water will combine with the dye. And the impurity in the poor water will agglomerate with the dye. Both of them will cause color defect. The auxiliary related with the color defect is penetrating agent, leveling agent, chelating dispersant and PH value control agent. If the penetrating property is poor, the dyeing will not even. and the color defect will occur. Especially for the shattered cotton dyeing, cheese dyeing, heavy fabric dyeing, the penetrating agent is very important. Some manufactures only use JFC, but they fail to consider that the cloud point is among 38-4

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