The standard specifies the standard method to be used in comparing the contrast ratios given by paint films of white or light colours, of reflectance factor greater than 40%, dried at normal air temperatures and applied at approximately equal wet film thickness to black and white substrates.
DS/EN ISO 2814:2006 history
2006DS/EN ISO 2814:2006 Paints and varnishes - Comparison of contrast ratio (hiding power) of paints of the same type and colour