Muhammad Shahzad Textile Dyeing& Printing

Govt. College Of TechnologySamanabad,Faisalabad.shahzad72@engineer.com

0300-6622519

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Classification of DyesClassification of Dyes

• No single class of dye can dye all fibers.

Dyes for Cellulosic Dyes for Cellulosic Fibers:Fibers:

•Direct Dyes•Sulphur dyes•Vat Dyes•Reactive Dyes

Introduction to Coloration & Finishing

Dye Class

General description

Main application

Direct Simple application; cheap; complete colour range;

Mainly used for cellulosic fibers;like,cotton, can also be applied on rayon, silk & wool.

DIRECT DYESDIRECT DYES

Yellow Pink Brown Turquois

e

Orange Red Violet Black

Fushia Grey Green Forrest Green

Scarlet Blue Wine China Blue

Introduction to Coloration & Finishing

Classification of dyesClassification of dyesDye Class

General descriptionMain application

Sulphur Difficult to apply (reduced dyeing with sodium sulphide ); cheap particularly for dark shade;

Mostly used for heavy cellulosic/cotton goods in dark shades.

Classification of dyesClassification of dyesDye Class

General descriptionMain application

Vat Difficult to apply (reduced with sodium hydorsulphite); most expensive;incomplete colour range.

Commonly used for high quality cotton goods, like, towel, curtain .

Introduction to Coloration & Finishing

VAT DYESVAT DYES

Color range

YELLOW GREENORANGE OLIVE B

RED BROWNBLUE NAVY

VIOLET BLACK

Introduction to Coloration & Finishing

Classification of dyesClassification of dyesDye Class

General description

Main application

Reactive Easy application; moderate price; complete colour range; good fastness due to direct reaction with fibres.

Commonly used for all cellulosic/cotton goods especially in knitted and woven fabrics..

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REACTIVE DYESREACTIVE DYES

• Cold water fiber reactive dyes, suitable for dyeing on cotton, silk, jute, rayon .Cannot be used on synthetics fabrics

Yellow 2GL

Golden Yellow 2RL

Orange 2R

Scarlet

Red BG (primary)

Red 4B (bluish red)

Red 8B (magenta)

Rubinole 5B

Brilliant Blue 2R

Brilliant Blue BL

Violet 2R

Turquoise 2G

Navy GRL

Brown 2R

Brilliant Green BL

Black B (blue base)

Black 2B

2004

Colour Colour FormulatiFormulati

onon

• Colour match recipes are first developed on a small laboratory basis.

How to use Grey ScaleHow to use Grey Scale

Common Colour Fastness:Common Colour Fastness:

•washing,•light exposure,•dry cleaning,•perspiration •rubbing (crocking).