Viscose Rayon Pretreatment -Knitted fabric

Knitted fabric – on jet or overflow machine

Scouring (No bleaching for dark and medium shades):

* 2 – 4 ml/l Lubricating agents
* 0.5 – 1 g/l Wetting & scouring agent
* 0.5 – 2 g/l Chelating agent
* 1.0 - 3.0 g/l Soda ash
o Run 20 to 30 minutes at 60-90° C
o Hot wash

Peroxide bleach on jet or overflow machine
For full white
1.0 – 3 ml/l Lubricant
2 – 4 g/l Optical Whitener
2 – 6 ml/l Hydrogen peroxide 35%
0.3 – 0.7 % Peroxide Stabilizer

* Run 40 minutes at 85° C
* Hot rinse at 60 – 80° C
* Neutralise with core acid neutralizer for 10 – 15 minutes at 50-60° C

Note: There is a high risk of forming permanent creases in rope dyeing machines because viscose fibre swells and fabrics become stiff. Fabric will therefore not run well at temperatures below 50° C. Fabric must always be run at temperatures of 50° C or higher. Cool at a gradient of not more than 1° C per minute to prevent hydro plastic creasing.