Colour measurements Three indicators are necessary to describe the perceived lightness or brightness and colour of an object. One describes its lightness and two more describe the hue and saturation of the colour. Several colour systems exist. Two methods dominate in the paper industry: CIE’s system of 1931 and CIE L*, a*, and b* coordinates
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Colour measurements
After reading this article you will..
- know that colour can be measured in different ways.
- know that the most commonly used colour space is the CIELAB.
- know that the colour difference is more easily defined in CIELAB colour space.
Content
Material testing and product properties
- Why test pulp and paper?
- Fibre properties
- Papermaking properties of pulp
- Fluff pulps
- Chemical analysis of pulps
- General physical properties of paper and board
- Optical properties of paper
- End-use properties of printing papers
- End-use properties of packaging papers and boards
- Tissue papers
- Permanent papers
- Reliability of results in physical testing of pulp and paper
- Quality control at the mill
- Standardisation in pulp and paper testing
Authors & references
Edited by:
Petteri Maijanen, ABB
Other authors:
Juhani Vaarasalo
Based on: Vaarasalo J., Optical properties of paper (Chapter 8). In: Levlin, J-E. & Sjöderhelm, L. (ed), Pulp and paper testing (Book 17), Papermaking Science and Technology. Jyväskylä. 1999. Fapet Oy. pp. 163-181.
References:
- Hunter, R. S. and Harold, R. W., Ed., in The Measurement of Appearance, 2nd Edition, John Wiley & Sons, New York, 1987.
- Pauler, N., Paper Optics, 2nd Edition, AB Lorentzen & Wettre, Kista, 2012, p. 43
- Wyszecki, G., Stiles, W. S., Colour Science: Concepts and Methods, Quantitative Data and Formulae, 2nd Edition, John Wiley & Sons, New York, p. 308, 1982
- Pauler, N., Paper Optics, 2nd Edition, AB Lorentzen & Wettre, Kista, 2012, p. 45
- Pauler, N., Paper Optics, 2nd Edition, AB Lorentzen & Wettre, Kista, 2012, p. 47
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This page has been updated 31.03.2021
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