Cockling Cockling is a phenomena that appears as an inhomogeneous surface of paper. It refers to heat-induced changes in the paper surface and is visible as a wrinkled or wavy structure of the paper. A cockle is an out-of-plane area of the paper surface with a diameter of 5 – 50 mm. The main reason
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Cockling
After reading this article you will..
- know that the cockling appears as an inhomogeneous surface of the paper.
- know that it is shown as a wrinkled or wavy structure of the paper.
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 author:
Olli Suontausta
Based on: Suontausta, O. End-use properties of printing papers (Chapter 9). In: Levlin, J-E. & Sjöderhelm, L. (ed), Pulp and paper testing (Book 17), Papermaking Science and Technology. Jyväskylä. 1999. Fapet Oy. pp. 195-197.
References:
- Kiiskinen, H., Pakarinen, P., Linna V., Finnish Pat. No. 91022 (14.1.1994).
- Nam, W. -S. and Thorpe, J., Deformation in copy paper with changing moisture conditions. Paper Physics Seminar, STFI, Stockholm, 1996, p. 65.
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This page has been updated 26.03.2021
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