scope:

This part of EN 12608 specifies the classifications, requirements and test methods for non-coated unplasticized poly(vinyl chloride) (PVC-U) profiles with light coloured surfaces intended to be used for the fabrication of windows and doors. It is applicable to PVC-U profiles with the colorimetric co-ordinates measured on the visible surfaces, as follows: - L * ? 82 (chromaticity co-ordinate Y ? 60) - -2,5 ? a* ? 5 - -5 ? b* ? 15 when determined in accordance to ISO 7724-1 [1], ISO 7724-2 [2] and ISO 7724-3 [3], using CIE Standard illuminant D65 including specular reflectance and measuring condition 8/d or d/8 (without gloss trap for both), the angle of observation being selected as either 2° or 10° according to ISO 7724 1.