Monday, November 16, 2009

Cotfix RGB series


Nuchem Dyestuffs P Ltd offers the following three dyestuffs as its economical Trichromatic colorants for producing brilliant dark and medium shades on cellulosic materials.

These three products can be applied using any common exhaust, Cold Pad Batch (CPB) or any conventional method with ease. These robust dyestuffs are suitable for all round fastness requirements of Dark and Medium shades.

Please start your dyeing on a well prepared, uniform absorbent cellulose fabric with neutral or slightly acidic pH. Make sure that your fabric is free from residual peroxide and core alkali.

Set your dye-bath with suitable sequestering, leveling and lubricating agent.

The RGB dyestuffs can be applied using any one of the following methods:

Exhaust: Since the strike off rates of Red RGB is very high and Blue RGB is low, the alkali addition (soda and caustic) should be made in several portions (3 to 4 times at 10 to 20 minutes interval at room temperature). The final pH should be 11.0 to 11.5.

After dyeing it is recommended to do one hot wash at 80°C followed by cold wash, neutralization with Acetic acid (1 to 3 gm/liter) and a thorough soaping at boil for 20 to 30 minutes.

For better light fastness please avoid doing cationic fixing treatments.