NF T31-230-21*NF EN ISO 787-21:2017 General methods of test for pigments and extenders - Part 21 : comparison of heat stability of pigments using a stoving medium
2017NF T31-230-21*NF EN ISO 787-21:2017 General methods of test for pigments and extenders - Part 21 : comparison of heat stability of pigments using a stoving medium