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Color Extraction Of Acid Dyes

Date:Jun 27, 2019

Use ammonia water (20 ~ 30g/L) and anion wetting agent (1 ~ 2g/L) to boil for 30 ~ 45min. Before treatment, use insurance powder (10 ~ 20g/L) at 70℃, which is conducive to complete color extraction. You can also use the oxidation color extraction method.

Under acidic conditions, the addition of special surfactants can have good color extraction, or can use alkaline conditions.

Color drawing process for real silk:

Reduction stripping bleaching (soda ash 1g/L, ping + O 2g/L, safety powder 2 ~ 3g/L, 60℃, 30 ~ 45min, bath ratio 1:30) → pre-media treatment (FeSO4, 7H2O 10g/L,50% phosphoric acid 2g/L, formic acid PH= 3 ~ 3, 5,80 ℃×60min) → bleaching (80℃×20min) → oxidation stripping bleaching (35% hydrogen peroxide 10mL/L, nasio3.5h2o 3 ~ 5g/L,70 ~ 80℃,45 ~ 90min, PH=8 ~ 10) → cleaning

Wool color extraction technology;

Nivaltine an4%; Oxalic acid is 2%; Raise the temperature to boiling point within 30min, keep it for 20 ~ 30min, and then clean it.

Nylon color extraction process:

36°NaOH 1% ~ 3%; Pingjia O 15-20%; Synthetic detergent 5% ~ 8%; Bath ratio 1:25-30; 98 ~ 100 ℃; 20 ~ 30min (until all decolorization). After all the decoloring, the product was gradually cooled down and washed with water. 0 and 5ml/L acetic acid was then used for treatment at 30℃ for 10min to fully neutralize the alkali remaining on the nylon and then washed with water.