DIN 53235-2
DIN 53235-2 Testing of pigments - Tests on specimens having standard depth of shade - Part 2: Adjustment of specimens to standard depth of shade
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2005
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/2005