1 This International Standard specifies three methods for the measurement of the specular gloss of paint films, with 20°, 60° and 85° geometry. The methods are not suitable for the measurement of the gloss of metallic paints.
a) The 60° geometry method is applicable to all paint films but, for very high-gloss paints or those of near-matt sheen, the 20° or the 85° geometry method may be more suitable.
b) The 20° geometry method is intended for obtaining improved differentiation of high-gloss paints, that is those with a 60° gloss higher than 70 units.
This does not mean, however, that the 60 geometry method cannot be used for paints having a 60° gloss higher than 70 units.
c) The 85° geometry method is intended for obtaining improved differentiation of low-gloss paints, that is those with a 60° gloss lower than 30 units.
This does not mean, however, that the 60 geometry method cannot be used for paints having a 60 gloss lower than 30 units.
2 Two procedures are given in clause 5, the first (5.1) being for assessment of a film prepared from a liquid paint sample and the second (5.2) for assessment of an existing painted surface.
DS/ISO 2813:1984 history
1984DS/ISO 2813:1984 Paints and varnishes. Measurement of specular gloss of non-metallic paint films at 20 degrees, 60 degrees and 85 degrees