Validity limits of Kubelka-Munk theory for DRIFT spectra of photodegraded solid wood

L. Tolvaj, K. Mitsui, D. Varga

Research output: Article

58 Citations (Scopus)


The validity of the Kubelka-Munk (K-M) theory was investigated to determine the IR absorption spectra of wood based on diffuse reflection infrared Fourier transform (DRIFT) measurements taken on photodegraded samples. After analysing plenty of DRIFT spectra of wood and examining the shape of the K-M equation, it can be concluded that the measured K-M function can be used as an absorption spectrum if the values of the function are below 14 K-M units. Above this limit, the K-M theory, which was created for poorly absorbing materials, does not give the absorption of wood properly. If a matt aluminium plate is used as a background material and the values are between 14 and 40, absorption changes can be calculated after normalisation of the spectra. This normalising manipulation is only successful if there is an absorption peak close to the examined one which does not change its absorption during the photodegradation.

Original languageEnglish
Pages (from-to)135-146
Number of pages12
JournalWood Science and Technology
Issue number1
Publication statusPublished - febr. 1 2011


ASJC Scopus subject areas

  • Forestry
  • Materials Science(all)
  • Plant Science
  • Industrial and Manufacturing Engineering

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