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Selection of dyeing methods with vat dyes
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According to the properties of vat dyes, the assistant dyeing method was selected

1、 Dyes with high aggregation tendency

It needs to be dissolved in the dye solution with high concentration of NaOH

Due to the low diffusivity, it is necessary to increase the temperature properly to accelerate the dyeing process

Without promoter

Nail staining

2、 Dyes with low aggregation tendency

The concentration of NaOH should be reduced properly

The dyeing temperature should be reduced due to high diffusivity

Add dye promoter

C staining

Updated:2020-08-24 | Return
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