Applied Physics A

, Volume 75, Issue 6, pp 673–676 | Cite as

IR pulsed laser light interaction with soiled cellulose and paper

  • J. Kolar
  • M. Strlič
  • M. Marinček

Abstract.

Nd:YAG laser irradiation (1064 nm) of cellulose samples does not lead to immediate nor long-term effects on mechanical properties of paper, which renders the method increasingly interesting for cleaning of historical paper artefacts. However, the technique’s usability is so far limited due to discoloration when the treated object’s surface contains carbonaceous dirt. By using diffuse-reflectance Fourier-transform infrared spectroscopy, size-exclusion chromatography and viscometry it is demonstrated that the distinct yellowing is accompanied by formation of ether cross-links and dehydration of the cellulose, as well as its depolymerisation. Furthermore, the origin of the discoloration is discussed and it is proposed that yellow chromophores are formed due to carbon–cellulose interactions during laser irradiation.

PACS: 42.62.-b; 61.80.Ba; 83.80.Lz 

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Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • J. Kolar
    • 1
  • M. Strlič
    • 2
  • M. Marinček
    • 3
  1. 1.Preservation Department, National and University Library, Turjaska 1, SI-1000 Ljubljana, SloveniaSI
  2. 2.Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, SI-1000 Ljubljana, SloveniaSI
  3. 3.Fotona d.d., Stegne 7, SI-1210 Ljubljana, SloveniaSI

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