EN ISO 4628-7:2016
色漆和清漆.涂層降解的評價.設計缺陷量值大小和外觀統一變化強度.第7部分:天鵝絨的方法評價粉化程度(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