Colorfastness to bleaching:Peroxide
ISO-105-N02-1995
This method is intended for determining the resistance of the colour of textiles of all kinds, and in all forms, to the action of bleaching baths containing peroxide in concentrations commonly used in textile processing.
A specimen of the textile in contact with adjacent fabrics is immersed in the bleaching solution, rinsed and dried. The change in color and the staining .
Brief description
Bath1 (for natural and regenerated cellulose)
Treat the test specimen and adjacent fabric in bleach solution containing 5 ml /ltr hydrogen peroxide ( 30% solution) ,5 ml/l sodium silicate and 0.1 gpl of magnesium chloride. Set the initial pH 10.5 ,m:l 1:30, for 1 hr at 90 deg cel. Rinse for 10 min in cold water ,squeeze and hang to dry in warm air at max 60 deg cel.
Bath 2.(for natural and regenerated cellulose)
sodium peroxide(30%) 3 gpl
sodium silicate solution 5 ml/l
magnesium chloride 0.1 gm/l
Initial pH 11.3-11.7
M;L 1:30,temperature 80 deg cel for 60 min.
Bath 3( for wool and acetate)
Hydrogen peroxide(30%) 20 gpl
sodium pyrophosphate 5 ml/l
magnesium chloride 0.1 gm/l
Initial pH 10.0
M;L 1:30,temperature 70 deg cel for 120 min.
Bath 4( for silk)
Hydrogen peroxide(30%) 20 gpl
sodium silicate solution 5 ml/l
Initial pH 9.3
M;L 1:30,temperature 50 deg cel for 120 min.
For detailed information on the subject please go here
BS-en-ISO-105-N02-1995
http://www.dfmg.com.tw/member/standard/bs/BS-N02.HTM
dear Hanu ji
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Dhawal shah
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