Stripping Procedure

Stripping:

Stripping is carried out to remove uneven of shade or to reduce darkness of shade. 

Full stripping for 100% cotton:

1. Detergent: 1 g/l
2. Caustic soda: 3 g/l
3. Kapatex R 98: 5g/l

Process steps:

• Take water at required level
• Load the fabric
• Raise the temp at 60 Degree C & circulate the fabric..
• Add sequestering agent, anticreasing agent..
• Raise the temp. at 70 Degree C add Castic soda..
• Raise the temp. at 80 Degree C & add Hydrose..
• Circulate the fabric & raise the temp at 100 Degree C & continue 60 min
• Decrease the temp at 80 Degree C & rinse for 10 min & drain
• Add acetic acid and raise the temp. . at 60 Degree C and run for 10 min..
• Drain

Washing for colored fabrics:

• The colored fabrics to be washed is loaded in the machine
• Required amount of water is taken
• PCLF (detergents) added & washing continued at 80 Degree C for 20 mins
• Cold washing

Re-dyeing:

When shade is not matched then fabric is treated again in dyeing machine for shade matching is known as re-dyeing..
Generally, re-dyeing is done if the shade is deeper than the target shade.  It may occur when the fabrics absorb one or two colors more or less.

One re-dyeing process is described below..

• Drain the let off solution
• Hot wash at 70-80 Degree C
• Acid wash at 60-70 Degree C(60 for light shade & 70 Degree C for deep shade)..
• Soda ash washes at 90-100 Degree C for 60 mins to reduce the depth of shade..
• Acid wash at 60 Degree C..
• Addition to required dyestuffs..
• Salt addition..
• Soda ash addition..