Online quality measurements Introduction Automatic online quality measurements can be installed in pulp, paper and board manufacturing processes. They measure different quality properties like fibre length, brightness and colour, air permeance, gloss, thickness etc. The strength properties of a paper or board cannot be measured directly online. They can be estimated from collected process data
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Online quality measurements
After reading this article you will..
- understand that an advantage of the online quality measurement is the use of the measurement data for the process control, not for the quality specifications of the paper or board.
- know that most measurements of the different online quality measurement systems are not according to standards, and they require calibration or correlation against the laboratory measurements.
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
Author:
Petteri Maijanen, ABB
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This page has been updated 28.04.2021
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