Colorfastness to Chlorinated Water | Color Fastness to Chlorine

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Theory:
The test method by which this test is carried out is ISO 105 E03. Chlorinated Pool water fastness is getting more importance in Terry Towel industry for swimwear and also for yarn dyeing. This method is designed to evaluate the resistance to Chlorinated Pool Water of any colored textile substrate. Here, the test specimen is treated in diluted Chlorine solution under specified conditions of available chlorine content, time and pH condition.
Colorfastness to Chlorinated Water
Apparatus:
  1. Gyrowash
  2. Grey scale
  3. Color matching chamber
  4. Glass beaker
  5. Stainless steel container
  6. pH meter
Reagent:
1. Distilled water or de-ionized water.
2. NaOCl solution (100 gm/l, 50 gm/l, 20 gm/l of active chlorine at pH 7.5±0.05)

Sample Preparation:
A textile material (Dyed Goods) sample should be cut at 10 cm into 4 cm.

Procedure:

1. Put the specimen into the steel containers and added in the sodium hydrochloride solution with liquor ratio 1:100 based on the appropriate concentration of active chlorine used.
2. Close the container and put it inti the mechanical device (Gyrowash) and agitate at 27±20C for 1 hour in darkness.
3. Remove the specimen from the container and squeeze it.
4. Dry the specimen by hanging it in air at room temperature in quiet light.


Evaluation:
Compare the contrast between the treated and untreated sample with Grey scales for changing color of dyed sample in a color matching cabinet. Numerical rating for color changing is the shade. 
 

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