Abstract
Susceptibility of Thermo-Mechanically Modified Scots Pine (Pinus Sylvestris L.) Sapwood and Heartwood to Colour Change under the Influence of Ultraviolet Radiation
Highlights
It was specified to what extent the factors under analysis affected the wood colour parameters immediately after the modification and after 300 h of light irradiation of wood
The degree of densification of sapwood was so high that comparable densities were achieved for sapwood and heartwood as a result of modification
The temperature of thermo-mechanical modification showed a significant influence on all pine wood properties under study (p < 0.05)
Summary
The colour of wood is an effect of the selective reflection and diffusion of light rays with wavelength characteristic of a given material. A material has a colour corresponding to the spectral composition of reflected and diffused rays. The colour of wood depends on a number of external factors, among which climatic conditions play the most significant role (Hon and Minemura, 1991; Sharratt et al, 2009; Tolvaj and Mitsui, 2010). Depending on the type and content of extractives, particular wood species show different susceptibility to colour change under the influence of ultraviolet radiation (Pandey, 2005; Persze and Tolvaj, 2012; Moya, et al 2012)
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