ISO 4628-7:2016
涂料和清漆. 涂层老化评估. 缺陷数量和大小以及外观均匀变化程度命名. 第7部分: 采用天鹅绒布法测定粉化程度
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