This standard is one of a series af standards dealing with the sampling and testing of paints, varnishes and related products. It specifies a test method for determining the specular gloss of paint film using a reflectometer geometry of 20°, 60° and 85°. The method is not suitable for the measurement of the gloss of metallic paints. a) The 60° geometry is applicable to all paints films, but for very high gloss and near-matt films 20° or 85° may be more suitable. b) The 20° geometry, which uses a smaller receptor aperture, is intended to give improved differentiation between high-gloss paint films (i.e. films with a 60° specular gloss higher than about 70 units). c) The 85° geometry is intended to give improved differentiation between low-gloss paint films (i.e. films with a 60° specular gloss lower than about 10 units).

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