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Muhammad Shahzad Textile Dyeing& Printing
Govt. College Of TechnologySamanabad,[email protected]
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).
