KS M ISO 4628-4-2023 色漆和清漆 涂层降解的评价 缺陷数量和尺寸的指定以及外观均匀变化的强度 第4部分:开裂程度的评估
Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 4: Assessment of degree of cracking