This Part of this European Standard specifies methods for the measurement of specular reflectance and specular gloss of flat samples of anodized aluminium using geometries of 20°
(method A), 45° (method B), 60° (method C) and 85° (method D), and of specular reflectance by an additional 45° method
(method E) employing a narrow acceptance angle.
The methods described are intended mainly for use with clear anodized surfaces. They can be used with colour-anodized aluminium, but only with similar colours.