Denim Wash Ppt

Value Addition in Denim through its washing effects at Shahi Exports Pvt. Ltd

Presented By: Kumari Priyanka Roll No- 13

Introduction  Denim washing is know as one of the finishing treatment that has vast usage because of creating special appearance and updating clothes  There is different methods of denim washing.

DENIM WASHING  Aesthetic finish  Dry denim-Not washed after dyeing  Washed denim-Natural distressing of dry denim is attempted to replicate

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WHEN IT STARTED?  The concept of washing the Denim jeans was started by Jack Spencer for the brand Lee.  Stone-wash was first started by Francois Girbaud.  The concept of sandblasting was started in 1988 by a number of branded companies in Italy.

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Types of washes

Mechanical washes

Stone wash

Whiskering

Chemical washes

Sand blasting

Enzyme wash

Bleach wash

On the base of chemical use

Acid wash

spray

TYPES OF DENIM WASHES 1. Chemical washes - Denim bleaching - Enzyme wash - Acid wash 2. Mechanical washes - Stone wash - Microsanding 6

CHEMICAL WASHES DENIM BLEACH  Strong oxidative bleaching agent such as sodium hypochlorite or potassium permanganate.  Bleaching methods  Bleaching effect

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Process cycle:

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Limitations:  Process is difficult to control  Problem of yellowing  Required antichlor treatment  Causes corrosion  Harmful to human health  Source of environmental pollution 9

ENZYME WASH  Application of organic enzymes  Easy to stop the action of enzymes  Environment friendly wash

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Limitations:  Garment load size of the machine is limited.  Post treatment required. More advantages than disadvantages:  Soft handle  More reproducible results  Increased luster  Less corrosive  Less damage to seams  Less wear & tear of machinery  Applicable to cotton and its blends 11

ACID WASH  Pumice stones presoaked in a solution of sodium hypochlorite or potassium permanganate.  Non-uniform contrast.

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Process cycle

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 Results depends on:-Fabric -Chemical used(conc.) -Stone(quantity) -Machine used

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Limitations  Yellowing; residual manganese Remedy: Using ethelene-diamine-tetra-acetic acid as chelating agent.

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MECHANICAL WASHES STONE WASH  Tumbled with pumice stones  Variations in composition, hardness, size, shape and porosity make these stones multifunctional.

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Selection of stone  According to the end product & effect required.  Large, hard stones last longer and may be suited for heavy weight fabrics only.  Smaller, softer stones would be used for light weight fabrics and more delicate items.  Stone wt. /fabric wt. = 0.5 to 3 /1

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Limitations  Outcome of a load of jeans is never uniform.  Damage to wash machineries and garment due to stone to machine abrasion.  Increase in labor to remove stone particles from finished garments.  Water pollution during disposal of used liquor.

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MICROSANDING There are 3 ways for this technique:  Sandblasting  Machine sanding  Hand sanding or hand brushing

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Used in various ways: - Flat surfaces (tables, ironing boards) - On the dummy (inflatable dummies, sometimes standing, sometimes flat, sometimes 'seated') - Various templates can be used to create a 3D effect

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SAND BLASTING  This technique is based on blasting an abrasive material (mostly sand) in granular, powdered or other form through a nozzle.  It is purely mechanical process.  It is a water free process.  Variety of distressed or abraded looks possible. 21

process

product look

MACHINE SANDING  In this fabric treatment process, a series of cylindrical rolls in a horizontal arrangement, either wrapped with an abrasive paper or chemically coated with an abrasive.

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HAND SANDING OR HAND BRUSHING  Use of sandpaper to abrade surface.  Variety of looks and designs can be created.

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WHISKERING  Also known as Cat's    

Whiskers. Crease lines around the crotch. Knee whiskers. Honeycombs. Industrially done using different techniques.

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Materials & Methodology  This is the general processing cycle which I analyses in the company for all the four samples Load garment & Stone

Desize

Rinse

Soften

Rinse

Stone Wash

Tumble Dry

Unload

Extract 26

Following Wash are Applied in the Samples:

 Dark Stone Wash  Mid Stone Wash  Super Stone Wash  Ice Wash

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Result & Discussion Swatch No

Type

Shade

Result

Sample 1

Dark Stone

Dark

Good

Sample 2

Mid Stone

Medium

Good

Sample 3

Super Stone

Light

Good

Sample 4

Ice Wash

Whitish Blue

Good

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Swatch No

Type

Test Done

Result

Sample 1

Dark Stone

1. Shrinkage 2. Shading..

Good

Sample 2

Mid Stone

1. Shrinkage 2. Shading..

Good

Sample 3

Super Stone

1. Shrinkage 2. Shading..

Good

Sample 4

Ice Wash

1. Shrinkage 2. Shading..

Good

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Conclusion  Denim is unique in its singular connection with one color. The warp yarn is traditionally dyed with the blue pigment obtained from indigo dye. The durability of indigo as a color and it’s darkness of tone made it a good choice, when frequent washing was not possible. The different tones are made in the garment by using different type of stone wash like Dark stone, Mid stone, Light stone, Ice wash. 30

Thank You!!

Percentage of Benefits Achieved Typical Results from Lean Conversions 0 Lead Time Reduction

Productivity Increase WIP Reduction Quality Improvement Space Utilization

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50

75

100