Colour reversion Exposure of pulp to elevated temperature, high humidity and visible or ultraviolet light, such as in accelerated aging, may provide information concerning the natural change in brightness or colour reversion that might occur in the material over a period of years. Literature provides many examples of different methods for accelerated aging of cellulosic
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Colour reversion
After reading this article you will..
- know that colour reversion can be measured by using accelerated aging methods.
- understand that in post colour measurement the scattering and absorption coefficients are measured by using brightness weighting function instead of Y (C/2) weighting function.
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
Original authors:
Tiina Hausalo, Liva Söderhjelm
Based on: Hausalo, T., Söderhjelm, L., Chemical analysis of pulps (Chapter 6). In: Levlin, J-E. & Sjöderhelm, L. (ed), Pulp and paper testing (Book 17), Papermaking Science and Technology. Jyväskylä. 1999. Fapet Oy. pp. 111–135.
References:
- Gullichsen, J., Paperi ja Puu 47(4a):215(1965)
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This page has been updated 30.03.2021
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