Standard No.:	GB/T 30789.2-2014
English Name:	Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 2:Assessment of degree of blistering
Chinese Name:	色漆和清漆 涂层老化的评价 缺陷的数量和大小以及外观均匀变化程度的标识：第2部分：起泡等级的评定
Chinese Classification:	G50    Basic standard and general method for coating
Professional Classification:	GB    National Standard
Issued by:	AQSIQ; SAC
Issued on:	2014-07-08
Implemented on:	2014-12-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	8000 words
Price(USD):	240.00
Delivery:	via email in 1~3 business day

GB/T30789的本部分给出了通过与标准图片比较评定起泡等级的方法。
本部分给出的标准图片说明了起泡大小2、3、4、5和每种起泡大小情况下起泡数量(密度)2、3、4、5。
ISO4628-1定义了关于涂层老化引起的缺陷的数量和大小以及外观均匀变化程度评定体系,并概述了评定体系的总则。本评定体系适用于人工加速老化和天然曝晒引起的缺陷和均匀变化,如颜色变化,例如:黄变。