ISO 4628-7:2003 色漆和清漆.色漆涂层剥蚀的评定.一般性缺陷程度数量和大小的规定.表面统一变化强度.第7部分：柔软法评定灰化程度

标准编号：ISO 4628-7:2003

中文名称：色漆和清漆.色漆涂层剥蚀的评定.一般性缺陷程度数量和大小的规定.表面统一变化强度.第7部分：柔软法评定灰化程度

英文名称：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

发布日期：2003-09

标准范围

ISO 4628-7:2003描述了一种特别适用于评定白色或彩色外部涂层和粗糙表面涂层系统（即ISO 8503-1中所述的粗糙度大于参考比较器G第4段的涂层系统）粉化程度的方法。规定的试验方法也可用于评估光滑表面上涂层和涂层系统的粉化程度，但ISO 4628-6中规定的方法更适合用于此目的。本试验方法适用于矿物基底上的涂层和涂层系统，例如纤维水泥、砖、混凝土和渲染，与表面结构无关。经验丰富的操作员可以非常有效地使用该方法，建议实验室使用和现场评估。

ISO 4628-7:2003 describes a method suitable, in particular, for rating the degree of chalking on white or coloured exterior coatings and coating systems on rough surfaces (i.e. those having a roughness greater than segment 4 of reference comparator G as described in ISO 8503-1).The test method specified may also be used for the assessment of the degree of chalking of coatings and coating systems on smooth surfaces, but the method specified in ISO 4628-6 is preferable for this purpose.The test method is applicable to coatings and coating systems on mineral substrates, e.g. fibre cement, brick, concrete and renderings, independent of the structure of the surface. The method can be used quite effectively by experienced operators and is recommended for laboratory use as well as for on-site evaluation.

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