Sharratt, Victoria, Hill, Callum and Kint, Darwin (2009) An in-depth study of early colour change due to simulated accelerated sunlight exposure in Scots pine (Pinus sylvestris). Polymer Degradation and Stability, 94 (9). pp. 1589-1594.

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Abstract/Description

A detailed study of early colour change in Scots pine (Pinus sylvestris) due to accelerated simulated sunlight exposure was undertaken focusing on the 1st 24 hours of change. Colour changes were monitored with a Datacolor check spectrophotometer and compared with a set of controls. Measurements on both samples and controls were performed hourly for the 1st 24 hours and there after daily until 168 hours’ exposure with extra measurements at 200, 350 and 500 hours. A subset of samples was extracted prior to exposure to check the effects of any colour change due to the presence of extractives. Data was analysed using the reflectance spectra (400-700nm) as well as the CIE-L*a*b* system and ΔE. The majority of colour changes were found to occur within the 1st 24 hours. This was unaffected by the removal of extractives from the wood and was independent of temperature.

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