2007DIN EN ISO 6504-3:2007 Paints and varnishes - Determination of hiding power - Part 3: Determination of contrast ratio of light-coloured paints at a fixed spreading rate (ISO 6504-3:2006); English version of DIN EN ISO 6504-3:2007-05
1983DIN 53778-3:1983 Emulsion paints; determination of contrast ratio and lightness of coatings