EFFECT OF NATURAL AGEING IN INDOORS CONDITIONS ON THE COLOUR OFWOOD SURFACES FINISHED WITH NATURAL TRADITIONAL MATERIALS

摘要

This research paper is related to conservation - restoration of decorated furniture objects with intarsia by highlighting the influence of aesthetic quality of these special surfaces. The effects of natural aging by indoor exposure are presented. Different wood species as well as finishing materials was employed in order to show in time evolution of chromaticity changes of the unfinished and transparently finished wood surfaces. The effect of in time colour modification, after, a total period of 18 month of natural aging exposure was studied. Three wood species were selected ash (Fraxinus excelsior), walnut (Juglans regia) and Sycamore maple (Acer pseudoplatanus) and three type of traditional finishing material (beeswax, linseed oil, shellac). This traditional finishing material was the most used material in furniture manufactured of old objects. The experimental results show that a protective finishing material, resisted to light, has to be used for maintaining the esthetical value of intarsia design. Otherwise the contrast colour between wood species is lost in time and will become null. The data are also useful for current approaches of the intarsia technique to provide data for an adequate choice of finishing technology with traditional products, which will add value to the objects.