Applies to the profiles with exposed surfaces in the colour range L* >= 82 (chromaticity co-ordinate Y >= 60), -2.5 <= a* <= 5, and -5 <= b* <= 15. It defines requirements for the raw materials and properties of unused white or near-white PVC-U profiles or profiles that are co-extruded for windows and doors up to the point of fabrication of the profiles into windows.