| Abstract [eng] |
Wood decorativeness is one of the most appreciable properties of wood. Wood is different from other decorative materials according its uniqueness. Naturalness is very important nowadays: natural food, natural cosmetics, renewable materials, etc. Wood is becoming more and more popular because it is natural, renewable and it is attractive for customer. Wood processing is changing: products of solid wood are replaced by chipboard products decorated with veneer and coatings based on solvent are replaced by water-based substances and others. This final master degree work „ Research of spectral sensitivity in the photodegradation of veneered surfaces„ is based on surface properties investigation of natural veneer decorated furniture based for economical class consumer needs. It is known about the damage caused by sun to human skin, and wood surface is not an exception – wood surface is aging, changing their color, gloss, and increase possibility of cracks and crevices while exposed by sunlight. Surface analyzed in this paperwork is for indoor usage and requirements for surface resistance are not strict. Depending on the place of exploitation, furniture can be irradiated by ultra-violet radiation and overtime it changes their aesthetic property. The aim of this paperwork is to identify surface color and gloss change during aging of unfinished and decorated with veneer surfaces. Furthermore present conclusions of what can consumer expect acquiring certain surface finished furniture after a certain period of time if the furniture is exposed by sunlight. Three different aging types were selected: quartz lamp, UV stand and aging under natural conditions, in order to compare changes in trends and determine whether it is possible to rely on ageing under artificial conditions. According to results – uncoated surfaces are more sensitive to sunlight rather that coated and the less color changes are got from surfaces which are coated with unclear coating materials. Comparing different types of surface aging the differences in color and gloss are visible and we could state that aging method has an influence to color because methods have different intensity of radiation and different wavelength. Also the temperature which is different in different methods plays important role because it cause higher color changing. |
