Tuesday, September 11, 2012

Pad steam method


Pad steam method:
 


Steps:
1)    Fabric is first padded in a padder with the dye.
2)    It is then passed through between two squeezing roller in a dryer. Drying should be done slowly; otherwise precipitation of dye due to quick removal of water may take place leading to lower color value.
3)    After coming out from dryer fabric is padded in a padder containing salt and alkali. Due to salt exhaustion of dye takes place and due to alkali fixation occurs.
4)    Fabric then passed through a steamer where it is kept for 15-19 second. Due to high temperature here fixation rate increases.
5)    In this step fabric is washed in a washing machine to remove the unfixed dye.

1 comment:

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