Chemical Aspects of Photo-Yellowing of High-Yield Pulps

  • Göran Gellerstedt
  • Liming Zhang
Conference paper


High-yield pulps such as TMP and CTMP turn yellowish on exposure to daylight (photo-induced yellowing) or heat in the presence of moisture (thermal yellowing). Whereas the latter type of yellowing may have an importance in e.g. the production process and in the paper machine, the former type predominantly occurs as a non-desirable process when the finished paper product is exposed to light. It has also been shown that the yellowing becomes more prominent when the brightness is high [1].


Alkaline Hydrogen Peroxide Paper Machine Mechanical Pulp Light Absorption Maximum Important Chemical Change 


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Copyright information

© Springer Japan 2004

Authors and Affiliations

  • Göran Gellerstedt
    • 1
  • Liming Zhang
    • 1
  1. 1.Department of Fibre and Polymer TechnologyRoyal Institute of Technology, KTHStockholmSweden

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