Super White Wash on Cotton Garments

Super white wash:
Super white wash is done on the garments made from grey fabric. The garments after washing look extremely white. Washing is carried out in mainly for increasing the whiteness effects of white fabric. In this washing mainly used chemical is optical brightening or whitening agent.
 
Super white wash on garments
Fig: Super white wash on garments
Purposes of super white wash:
  • To change the outlook of the garments.
  • To change the comfort ability of the garments.
  • To change the style of the garments.
  • To change the fashion of the garments.
  • To get a fading effect on the garments in irregular pattern.
  • To make the garments soft.
Equipments:
For garments washing there is not necessary for any elaborate machine. Here main equipments are the following:
  1. Garment washing machine
  2. Steam generated boiler
  3. Hydro-extractor
  4. Garments dryer
Raw materials:
Here raw materials are:
  1. One kilogram cotton fabric’s garment
  2. Detergent
  3. Softener
  4. Caustic soda
  5. Hydrogen per oxide (H2O2)
  6. Stabilizer
Washing process of super white washing:
Super white washing is done by the following steps.

1st Step (Pre-treatment)
  • For pre-treatment a batch of 1 kg cotton fabric is considered.
  • Load the machine with water at a ratio 1:10 that is 10 liter water.
  • Start the machine running.
  • Add detergent at 2% ……………………….. 0.02 kg
  • Add caustic soda ………………………………… 10%......................0
  • Hydrogen per oxide (H2O2) 12% …………………………0
  • Stabilizer …………………………… 5%....................................0.05kg
  • Temperature ……………………………………….. 950C
  • Continue treatment for 75 mm
  • Then drop the liquor
Explain:
Here detergent acts as desizing agent which drive away size materials. Again caustic soda acts as fiber cleaning agent that means it bring out impurities excepts cellulose such as peptin, peptose, wax, etc and transfer to the liquor as a result it become more clean and reduce it’s creamy coior.

Again
H2O2 acts as bleaching agent and it’s destroy natural color and become white. Stabilizer maintain proper bleaching action of H2O2. Here 950C temperature maintain optimum temperature and accelerate the process.

2nd Step (Hot wash):
  • Again load the machine with water at 1:10 that is 10 liter.
  • Start the machine running.
  • Add detergent ……………. 2% ……………..2kg
  • Add caustic soda ………………………… 4% ………………… 0.04
  • Hydrogen per oxide (H2O2) 100……………….. 0.1 kg
  • Stabilizer ………………… 4%............................0.04kg
  • Temperature ……………………………………….950C
  • Continue treatment for 90 min
  • Then drop the liquor
In this step action is almost same. Here whiteness will increase further a step.

Now after second step a hot wash will applied.

A.
  • Temp…………500C
  • Time…………….. 5min
  • Drop the liquor
Explain: Here garments will become fully clean.

B.
  • Batch size …………………………….. 1kg
  • Again load the machine with water at 1:10 that is 10 liter.
  • Start the machine running.
  • Add acetic acid …………………1% …………………..0.01 L
  • Continue treatment for 90 min.
  • Then drop the liquor.
Explain: Here the garments become neutral.

C.
  • Batch size …………………. 1kg
  • Again load the machine with water at 1:10 that is 10 liter.
  • Start the machine running.
  • Add FBA/FWA ……………….1% ……………..0.01 L
  • Continue treatment for 5 min
  • Then drop the liquor.
In this step whiteness effects will increase further one step.

Then unload the garments from the machine and done the following steps:
  • Hydroextruct the garments.
  • Drying the garments.
  • Finished the garments.
  • Delivery the garments to the supplier.
Results:
After completing this experiments we got a washed look super white garments.

Conclusion:
Now a days garment washing become essential in the readymade garment export business. So to fulfill the buyer’s requirement garments washing procedure is much important for garments manufacturing technology. Acid washing is only applicable in the heavy garments such as denim jeans etc. mainly cotton fabric. By this experiment we got a faded garments in irregular pattern.


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