Recommended cycle

*

*Recommended Pump Pressure Drain Line * Recommended Heating & Cooling Rate

*Yarn Quality

*Package Density (.31-.33g/cc)

*Uniform Package Diameter

*Proper compression to avoid channelling

*Straightend shoulder

PRETRETMENT

*Uniform Absorbency (<3sec)

*Residual Peroxide (Nil)

*Core PH (6-6.5)

*Whiteness Index (as desired)

DYE

ING

Dyeing Vessel or Machine

Heat Exchanger

Main Pump

Dyeing Pkg

IN/OUT

OUT/IN

Proper Method of Dye Dissolution

Suitable Dispersing & Levelling Agent

Recommended Amount of Caustic/Salt/ Soda

Sample Pot

Some Tips to Avoid Unevelness Problem in Package Dyeing:

1. Proper Pre-treatment should be ensured in terms of

Absorbency,Desizing,pH,Residual Peroxide,etc

2. Due to Sensitivity to hard water (Calcium) ,suitable Sequesting agent

should be incorporated,

3. Processing Conditions should be Strictly maintained.

4. Dye Dispersion should be properly prepared using Good Dispersing

Agent, Also check Filter paper Dispersion.

5. Suitable Dispersing & Levelling Agent should be used.

6. Controlled addition of Dyes is Desirable to Dye Bath.

7. Dyeing Temperature should be main tend as per Process.

8. Dyeing bath pH should be main tend strictly.

9. Proper Liquor Flow also to be Main tend in Dyeing (40kg/Lt/min).

10..Recommended Amount of Caustic soda & Soda Ash should be Main

tend.

11.Proper Removal of Soda Ash & Caustic Soda is Important after

Dyeing.

Standard Dyehouse Water Quality:

Discription Permissible Concentration

Colour Colourless

Smell Odourless

pH 7.0—7.5

Water Hardness >50ppm or 0.0143gm CaCo3 per

Lt of Water

Dissolved Solids 1mg/Lt

Solid Deposits 50mg/Lt

Organic Substances 10mg/Lt

Inorganic Salts 500mg/Lt

Iron(fe) 0.1mg/Lt

Manganese(Mn) 0.02mg/Lt

Copper (Cu) 0.005mg/Lt

Nitrate(NO3) 50mg/Lt

Nitrite(NO2) 5mg/Lt