The pigment washing process of batch of 80 kg Twill/Canvas garments are described below.

First step:– DETERZENT WASH

ü Lot weight(80pes)———— 80 kg denim long pant

ü Add water @L: R=1:8———– 640 liters.

ü Machine running

ü Add Caustic soda(NaOH)@ 0.8 gm/liter ————- 512 gm

ü Add Soda ash (Na2Co3) @ 1.50 gm/liter ———— 960 gm

ü Add Detergent @ 0.8 gm/liter —————– 512 gm

ü Temperature ———————— 50⁰c to 60⁰c

ü Time(depend upon the shade) ———————–5-10mts

ü Drop the liquor.

ü Wash one time by hot wash for 5 mts. At the temp. 50⁰c

ü Wash one time by cold water for 5 mts.

Second step:– HOT WASH

ü Add water @L: R=1:6———–480 liters.

ü Machine running.

ü Temperature ————— 60⁰c

ü Add Acetic acid (for pH 4.5-5.5) @ 0.6 gm/liter ——- 252 gm.

ü Add Flax softener@ 0.6 gm/liter ———— 288 gm.

ü Time ————– 15 to 25 mts.

ü Drop the liquor.

ü Unload the garments on trolley.

Third step:– HYDROEXTRACTOR MACHINE After unloading the garments from the washing machine then they are sent to hydro extractor machine to remove excess water from the washed garments.

Fourth step:STEAM DRYER/GAS DRYER

ü Load 50 kg garments to steam dryer.

ü Temperature set ——— 60⁰c to 70⁰c.

ü Run about 40-50 mts for dry.

ü Run about 10-15mts for cold dry.

OR

ü Load 50 kg garments to gas dryer.

ü Temperature set ——— 70⁰c to 85⁰c.

ü Run about 40-50 mts for dry.

ü Run about 10-15mts for cold dry.

Fifth step:– Delivery After dryer, garments go to quality section for quality checking and good one is delivered garments unit.

Results:

After pigment washing we get following result

Color is slightly out.

GSM decrease.

Increased softness.

Strength becomes less weak.

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