KS M ISO 4628-4-2013 涂料和清漆.漆膜降解的評定.缺陷量值、大小和外觀均勻改變程度的規定.第4部分:裂紋等級的評定
Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity, quantity and size of common types of defect — Part 4: Designation of degree of cracking