Types of Dye

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  • Created by: Rebecca
  • Created on: 20-05-15 21:57

DIRECT Dye

  • Soluble in water
  • Bright colours
  • Poor colour fastness
  • Moderate light fastness
  • Salts can be added to dye bath to help fibres absorb dye
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REACTIVE Dye

  • Soluble in water
  • Forms strong chemical bonds with cellulosic/protein fibres
  • Bright colours
  • Good colour fastness
  • Dye needs to be 'fixed'
  • Needs to be post-washed to get rid of excess dye (expensive)
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VAT Dye

  • Insoluble in water
  • Excellent wash and light fastness
  • Produces lighter shades of colour
  • Liable to colour crocking
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DISPERSE Dyes

  • Insoluble in water
  • Used to dye hydro-phobic fibres
  • Smallest dye molecules
  • Dye applied to fibres in fine aqueous dispersion (held inside by chemical bonds)
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ACID Dyes

  • Soluble in water
  • Bind together with proteins in fibre
  • Range of colours
  • Easy to apply
  • Good colour / light fastness
  • Wash fastness varies
  • Applied to fabric in acidic dye bath
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