KS M ISO 4628-7:2016 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
2021KS M ISO 4628-7:2021 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
2016KS M ISO 4628-7:2016 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
2011KS M ISO 4628-7:2011 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