NEW METHODOLOGY TO SELECT LIGHT SOURCE SPECTRAL DISTRIBUTION FOR USE IN MUSEUMS TO PROPERLY EXHIBIT AND PRESERVE ARTWORK

摘要

A new methodology to select light source spectral distribution for use in Museums is underrndevelopment. It is based in obtaining the Representative Spectral Reflectance Curve for eachrnartwork and then lighting it with a light source which spectral power distribution is coincidentrnin shape with the object′s RSRC. This should cause minimum damage due to radiation on thernobject, given that object deterioration due to radiation is an effect of absorbed energy. Inrnorder to evaluate presentation quality, colour differences were calculated for three primalrncolours present in an artwork sample, illuminated under Illuminants D65 and under arnsimulated illuminant which spectral power distribution matches the RSRC of the object. Also,rncolour differences were calculated between the same colours under D65 and under a CIErnstandard illuminant previously selected as having the closest spectral power distribution to thernRSRC. Results are in general lower than 3, within the limit for strict tolerance in normal colourrnrendering.