Photo-discoloration of wood surfaces not only causes the degradation of the wood properties,but also affects the commercial value when being used in decorative furniture or flooring products.Wood specimens of eighteen different species,which are usually used for furniture,were selected for an accelerated ageing test.After exposing the specimens to a xenon light for a certain amount of time,the specimens were taken out and compared with standard color samples.Colorfastness to light was rated in accordance with the grey scale.