Tuesday, May 4, 2010

* What are Exhaustion curves of Setazol Yellow 3RS, Red 3BS and Blue BRF? What are important fastness properties of Setazol Blue BRF?


- Three dyes has very close Exhaustion curves and therfore this combination obtain level dyeing with good reproducability,
- Setazol Blue BRF has high light fastness in 1/1 depth is (6),
- Setazol Blue BRF has lower Chlorinated Water (3) and Gas fastnesses (3).

* If requirement for shrinkage of Viscose knitted fabric is less than 5%?

a) If requirement for shrinkage of Viscose knitted fabric is less than 5%, it should be used a Free Steam dryer instead of normal stenter. After free steam dryer, material should be sanforazed in a sanforization machine.

b) Material should be in the Process as following;

- Weak Cold Caustification (it can help for better size stabilisation and less creasing of the fabric)
- Dyeing,
- Open width free steam dryer,
- Sanforization.