Stone Wash on Denim Garments

Stone wash: 
Denim is the most fashionable and preferred dress among the young generation. To modify the denim appearance, comfort ability, outlook and fashion of the dress various types of washing are done on denim garments. Stone wash is one of the most common wash on denim dress. Stone wash is done to bring “Used effect” or “Vintage effect” on the denim garments. Pumice stones are the key elements of stone washing. Because the fabric is washed along with pumice stones. During stone washing process, these stones scrap off dye particles from the surface of the yarn of the denim fabric which shows a faded, worn out and brilliance effect in the denim fabric.
Stone wash
Fig: Stone wash
Purposes of stone wash:
  1. To get irregular fading or old looking affect on garments.
  2. To increase softness feeling of the denim cloth.
  3. To achieve the buyer washing standard.
  4. To produced correct size.
  5. Wash look appearance is developed.
  6. To remove dust, oil spot, impurities from the garments.
Instruments of stone washing: Flowchart of stone wash:
Flowchart of stone wash
Fig: Flow chart of stone wash
Procedure of stone wash on denim dress:
Stonewash is done in six steps. All steps are given below:

Step-1:
  • Before stone wash, denim garments need pre-treatment. For pretreatment, a batch of X kg denim trouser is considered.
  • Load the machine with X kg garments.
  • Add water @ 1:5-------------------- 500L
  • Start machine running.
  • Add desizing agent @1:5----------------------1.5Kg
  • Start steam supply to raise liquor temperature at 60oC.
  • Continue treatment for 20 mins.
  • Drop the liquor.
Step-2:
  • Again, load the machine with water @ 1:5-------------------500L
  • Continue treatment for 5 mins.
  • Drop the liquor.
Step-3:
=> Add water @ 1:5---------------------500L
=> Start machine running.
=> Then add:
  • Bleaching powder @ 40%--------------4 kg
  • Soda ash @ 8%--------------------------8 kg
  • Pumice stone ---------------------------50% volume of the garments
  • Enzyme ----------------------------------- 2 g/L
  • M:L ----------------------------------------1:10
  • Temperature ----------------------------- 40-60oC
  • Time ----------------------------------------- 30-40 mins.
=> Continue treatment for 30-40 mins.
=> Then drop the liquor.

Step-4:
  • Again add water in the washing m/c @ 1:5------------------------500L
  • Then add detergent @1%---------------------------------------------1L
  • Raise liquor temperature at 40oC
  • Continue treatment for 5 min.
  • Drop the liquor.
Step-5:
  • Again add water in the m/c @ 1:5------------------------500L
  • Add acetic acid @1%---------------------------------------1L
  • Continue treatment for 5 min.
  • Then drop the liquor.
Step-6:
=> Add water @1:5---------------------------------------------500L
  • Softener @0.5%---------------------------------------------1/2 Kg
  • FBA/FWA @0.5% ----------------------------------------1/2 Kg
=> Continue treatment for 10 min.
=> Drop the liquor.

At last,
  • Unload the garments.
  • Hydro-extractor the garments.
  • Drying the sample.
Conclusion:
Stone wash is done to get fading effect on the denim garments. This practical gave us way to know how to wash with stone wash. This may be helpful in our professional life.

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