NF T30-071-7:2004 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 7 : assessment of degree of chalking by velvet method.
2004NF T30-071-7:2004 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 7 : assessment of degree of chalking by velvet method.