DIN EN ISO 4628-7:2004 色漆和清漆.漆膜降解的评定.缺陷量值、大小以及外观均匀改变程度的规定.第7部分:粉化等级评定用丝绒方法
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 (ISO 4628-7:2003); German version EN