Presentation on Bleach wash and super white wash. ppt

1. Submitted To:
Md. Mominur Rahman
Assistant Professor
Department of Textile
Daffodil International University
Submitted By:
Md. Robiul Islam
ID NO : 153-23-4464
Section : A(Evening)
Department of Textile
Daffodil International University

2. Bleach wash
 Bleach wash is the process which is done by using strong
oxidative bleaching agent. A bleach is a chemical that removes colors or
whitens, often via oxidation. Most widely used chemicals are sodium
hypo-chlorite, calcium hypo-chlorite, hydrogen per oxide and potassium
permangate

3. Object of Bleach Washing
 To remove the size material from the garments.
 To remove the starch present on the garments.
 For soft feeling to wear the garments.
 To increase the color fastness and rubbing fastness.
 Especially develop the “Bio-polishing’’ affect cotton/Denim.
 Enzyme improves the anti-pilling properties.

4. Advantage of Bleach Wash
 Can produce special effect on garments.
 Enhance the beauty of garments.
 Can attract the buyers easily.
 Huge demand to the young generation

5. Limitations of Bleach Wash
 Yellowing effect can be produced.
 Too much harmful for human health.
 Can produce shade variation.
 This process is difficult to control.
 Needed antichlor treatment.
 Causes corrosion
 It is one of the sources of environmental pollution.

6. Bleach Wash Process of Garments
First step: Desizing
 A process of bleach wash of 60 kg batch of Denim Long Pant as mentioned below:
 Batch size....................... 60 kg Denim Long Pant.
 Add water @ L: R = 1: 9.............. 540 litres.
 Start the machine.
 Temperature.................... 60°c
 Add Desizing agent@ 0.6 gm / litre ............ 324 gm.
 Add Detergent / Antistain @ 1 gm / litre..... 540 gm.
 Time................................ 15 to 25 mts.
 Drop the liquor.

7. Bleach Wash Process of Garments
Second Step: Hot Wash
Add water @ L: R = 1: 9.............. 540 litres.
Temperature....................................... 60°c.
Time................................................... 5 mts.

8. Bleach Wash Process of Garments
Third Step: Bleaching
 Add water @ L: R = 1: 8.............. 480 litres.
 Machine running.
 Add bleaching powder (k.c.i) @ 10 gm/litre.. 4800 Gms.
 Add soda ash @ 5 gm/litre ............................... 2400 Gms.
 Temperature............................................................ 60°c.
 Time (Depend upon the shade).................... 12 to 15 mts.
 Drop the liquor.
 Rinse twice, each 3 minutes

9. Bleach Wash Process of Garments
Fourth Step: Neutral Wash
Add water @ L: R = 1: 9.......................... 540 litres.
Add sodium hyposulphite @ 3 gm/litre ....... 1620 Gms.
Temperature ......................................................... 40°c.
Time (Depend upon the shade).............. 10 to 12 mts.
Drop the liquor.
Rinse one.

10. Bleach Wash Process of Garments
Fifth Step: Soft Wash
Add water @ L: R = 1: 8.............. 480 litres.
Add Acetic Acid @ 0.6 gm/litre ..................... 288 Gms.
Cationic softner @ 1 gm/litre ........................ 480 Gms.
Time................................ 5 mts.
Drop the liquor.
Unload the garments to trolley.

11. Bleach Wash Process of Garments
Sixth Step: Hydroextractor Machine
Hydroextraction the garment to remove excess water from
the washed garments.
Seventh Step: Drying Machine
Load 40 kg garments
Set temperature ................ 75°c to 85°c.
Time ......................... 35 to 40 mts.
Time ..................... 10 minutes in cold dry.

12. Bleach Wash Process of Garments
Eighth Step: Delivery
After quality checking garment will be delivery.

13. 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.

14. Objects of Super White Wash
 To make white the garments.
2.To achieve the buyer washing
standard.
 3.For soft feeling to wear the
garments.
4.To remove size materials from
the garments, etc

15. 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.

16. Equipments
Garment washing machine
Steam generated boiler
Hydro-extractor
Garments dryer

17. Process of Super White Wash
First Step: Desizing
 Batch size: 60 kg cotton grey fabrics
 Water @ L:R: 1:8
 Machine running
 Temperature up to 90°C
 Add detergent@2%(OWF)
 Cold caustic soda@8% (OWF)
 Add Soda ash @ 5% (OWF)
 Hydrogen per oxide @ 12% (OWF)
 Stabilizer @ 5% (OWF)
 Time: 70minutes
 Drop the liquor

18. Process of Super White Wash
Second Step: Bleaching
 Add detergent @1% (OWF)
 Add Caustic soda @ 3-4% (OWF)
 Hydrogen per oxide @ 6-8% (OWF)
 Stabilizer @ 2% (OWF)
 Time: 45-60 minutes
 Temperature: 90°C

19. Process of Super White Wash
Third Step: Hot Wash
 Temperature: 50°C-80°C
 Time: 5-10 minutes
 Drop the liquor
Fourth Step: Neutralization
 Temperature: 50°C-80°C
 Time: 5-10 minutes
 Drop the liquor

20. Process of Super White Wash
Fifth Step: Brightening
 Add optical brightener agent @ 0.5-0.6%
 Time: 5-10 minutes
Sixth Step: Softening
 Add softener @ 0.5-1%
 Time: 5-10 minutes
Seventh Step: Hydroextractor machine
 After unloading garments from the washing machine then they are sent to
hydroextractor machine to remove excess water from the washed garments.


21. Process of Super White Wash
Eight Step: Drying machine
 Load 60kg garments to gas dryer
 Machine running
 Temperature: 75°C-85°C
 Time: 40 minutes in hot dryer
 After then run 10 minutes in cold dryer.
Ninth Step: Delivery
 After dryer garment goes to quality section for quality checking and good on delivery.

22. Conclusion
 Understanding the topic bleach wash and super white wash its advantages,
precaution for , denim and garments washing selection for garments washing.
 I have learn object of bleach wash and super white wash.
 Now a days garment washing become essential in the readymade garment
export business.
 To know about bleach wash and super white washing process.
 So to fulfill the buyer’s requirement garments washing procedure is much
important for garments manufacturing technology

23. THANK YOU
FOR YOUR
ATTENTION