Specular gloss measurements from luminous reflectance by an absolute technique

Specular gloss is the perception by an observer of the mirror-like appearance of a surface. The specular gloss value is determined from the ratio of the measured luminous reflectance of a specimen to the theoretical Fresnel reflectance of the standard. Luminous reflectance has been measured by an absolute technique using the SIMT primary glossmeter, and resulting gloss values have been calculated. The measurement results agree well with theoretical gloss values, which validates the method and accuracy of our instrument.