Pigment Dye
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Burnout Wash is also called Vault Wash, Vintage Volt Wash, Shook Wash, Shock Wash.
The chemical being used to remove the cotton side is hydro sulfuric acid. Hydro sulfuric acid is reacted on cotton at high temperatures under wet conditions.
After reaction, some cotton parts are removed. Thus, a see-through or sheer look is the characteristic of burnout wash.
Due to the characteristic of the wash, the weight of the garment becomes lower than the weight before wash.
Process
01
1. Stitching
02
2. SCOURING
03
3. BURNOUT
04
3. BURNOUT
04
4. EXTRACTION
01
5. COOL DRY
02
6. HOT DRY
03
7. NEUTRALIZATION
04
8. SOAPING & SOFTENER
04
9. EXTRACTION
01
10. DRY
11. FINISHED GARMENT
Detail Process
1. Cotton fiber is almost pure cellulose. When cellulose (C6H1005) is in contact with acid chemicals, C6H1005 will be converted to C6H12O6.
2. Acid Chemicals: pH level is as low as 3~4 with acid chemicals.
NaHSO4 -> Na+ + H+ + SO4-
(C6H1005) + n(H20) -> (n-a)(C6H12O6) + a(C6H1005)
3. If remained C6H1005, cotton fiber is at pH 6~7, there will be no chemical reaction.
4. If remained C6H1005, cotton fiber is at pH 3~4 and wet condition, the chemical reaction will start.
5. Heat tumble dry process will make chemical reactions faster and finally, cotton fibers will be burned at high temperature.
6. Once the chemical reaction is completed through a tumble dry, some cotton fibers will be burned and taken away.
NaOH -> Na++ OH-, H+ + OH- -> H2O (Water, neutralization)
7. With the decrease of H+, they become water, and the neutralization process is done.
8. Burned cotton fibers will be washed out during the neutralization and rinse process.
Preparation for Bulk
1. Shadeband
2. Heavy Wash Effect
3. Burnout Line Effect
4. Pocket Issue
5. Thread Color Change
6. Burnout Spot
7. Uneven Effect #1
8. Uneven Effect #2
9. CSD DYE Crocking Issue
10. Hole Issue