Bleaching Recipe of Hydrogen Peroxide (H2O2) for Different Machines and Packages
Masum Sheikh
B.Sc. in Textile Engineering
Email: masum.tex13@gmail.com
Hydrogen Peroxide (H2O2)
Hydrogen peroxide is a strong oxidizer and is used as a bleaching agent. It is an universal bleaching agent and can be employed for wool, silk as well as cotton. It is specially suited to the bleaching of union fabrics containing both cotton and wool or silk. Here bleaching recipe of hydrogen peroxide are given for different package form and machine..
Bleaching Recipe of Hydrogen Peroxide (H2O2) for Different Purposes:
H2O2 bleaching in package form (for yarn dyed, check, stripe fabric):
- M/C are used mainly for treating yarns & loose cotton
- Before starting bleaching a pretreatment is sometimes carried outs consisting of circulation through the package foe solution of sodium tri-poly phosphate & some wetting agent at 95 foe 5-10 mins.
- This treatment removes surface impurities & prevents deposition of Ca & Mg salt in the package.
Recipe for package form bleaching (H2O2):
| Sodium silicate | 2-7 g/l |
| NaOH | 0.5 g/l |
| Na2CO3 | 1.8 g/l |
| H2O2 (35%) | 4.5 g/l |
| Wetting agent | 1 g/l |
| Temp | Is raised to 90 in 20-30 min & maintained for 1-2 hours |
| M:L | 1:5 to 1:10 |
Recipe for high temperature bleaching:
| Sodium silicate | 4 g/l |
| NaOH | 2-5 g/l |
| Na2CO3 | 1 g/l |
| H2O2 (35%) | 4.5 g/l |
| M:L | 1:5 to 1:10 |
Procedure:
Temp is first raise to 80 in 20 mins
↓
Then the m/c is closed
↓
The temp is elevated to 120-130 & maintained at this level for further 20 mins
Bleaching of cotton with H2O2 in a winch machine (recipe):
| Sodium silicate | 7 g/l |
| NaOH | 0.5 g/l |
| H2O2 (35%) | 1-2 g/l |
| Wetting agent | 1 g/l |
| Temp | 90-95 |
| Time | 1-2 hour |
| M:L | 1:5 to 1:10 |
Bleaching of cotton with H2O2 in a jigger machine (recipe):
| Sodium silicate | 4-10 g/l |
| NaOH | 1-1.5 g/l |
| H2O2 (35%) | 1.5-3.5 g/l |
| Wetting agent | 1 g/l |
| Temp | 80-110 |
| Time | 1-3 hour |
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- Bleaching Process in Textile: Its Purposes and Chemical Requirements
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Founder & Editor of Textile Learner. He is a Textile Consultant, Blogger & Entrepreneur. Mr. Kiron is working as a textile consultant in several local and international companies. He is also a contributor of Wikipedia.
