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Coatings

Ink, varnishes, paint and powder coated finishes require colour quality checks prior to acceptance. Coatings include a variety of materials which are used to protect and to present a pleasing finish to an otherwise drab looking product.   Many of these coatings are made up of natural products such as pigments and resins. There are designated colour scales for […]

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Ink, varnishes, paint and powder coated finishes require colour quality checks prior to acceptance.

Coatings include a variety of materials which are used to protect and to present a pleasing finish to an otherwise drab looking product.  

Many of these coatings are made up of natural products such as pigments and resins. There are designated colour scales for grading the colour of resin/rosin.

Scales & Values

Grading techniques are widely used to assess product colour by comparison with a representative series of fixed colour standards.

For many product types, a characteristic set of standards was agreed and adopted to aid colour control and the communication of colour specifications; the result is a selection of traditional colour grading scales that have been adopted as industry standards and are still in common use today.

Your Colour Scale requirement determines your instrument choice.
  • Barrett Scale
  • CIE 94
  • CIE L* u* v* Colour Space
  • CIE L*a*b
  • CIELAB (L*C*h)
  • CMC Tolerancing
  • Delta E* colour difference
  • Gardner Colour
  • Hunter Lab
  • Metamerism index
  • Optical density (Absorbance)
  • Rosin - French (Bordeaux) Colour
  • Rosin - US Naval Stores (ASTM D 509)
  • Transmittance
  • Whiteness Index (ASTM E 313)
  • xyY chromaticity co-ordinates
  • XYZ tristimulus values
  • Yellowness Index (ASTM E 313)