engleski

Oxidative Discolouration of Alder Wood (Alnus spp.) During Hydrothermal Processing

Recently, as a result of the recession there is decrease in demand for wood products on the Croatian market. As one of the methods for preserving wood industry production and increase competitiveness it is possible to introduce new commercially less interesting, rarely used species of wood in the manufacture of final products. These wood species are cheaper, which allows the final products of lower cost but with the same level of profit. One of these species is alder (Alnus spp.), which has great possibility in use, and its aesthetic characteristics can compete with commercially more used species. However, the presence of chemical substance named oregonin and difficulties in achieving of colour uniformity in hydrothermal treatment creates difficulties in further processing. The basic prerequisite for achieving high-quality wood is a good knowledge of the mechanisms of colour change, and this paper describes the oxidative discolouration of alder wood in hydrothermal processes with the aim of contributing to greater commercialization of this type of wood.

alder wood (Alnus spp.); discolouration; hydrothermal processes; oregonin

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