Research upon Alder Veneers under Visible Light Influence

colour

Abstract

The present research work presents the sunlight influence upon the colour of veneers made of alder wood (Alnus glutinosa) exposed indoor, behind a window glass, during summer and autumn, respectively for 1, 3 and 5 months. The colour of veneer samples was determined by using a Chroma Meter Konika Minolta CR-410 device. The colour coordinates L*, a* and b* were recorded before and after the exposure according to Standard ISO 7724-2. All colour coordinates supported variations with the exposure time. Alder veneers exposed to sunlight under indoor circumstances suffered a colour change, highlighted, generally, as a colour darkening and a tinge changing phenomenon.