GB/T 30789.2-2014
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 (English Version)

Standard No.

GB/T 30789.2-2014

Language

Chinese, Available in English version

Release Date

2014

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 30789.2-2014

Scope

This part of GB/T 30789 gives the method for evaluating the blister level by comparing with the standard picture. The standard pictures given in this section illustrate the blister sizes 2, 3, 4, 5 and the number of blisters (density) 2, 3, 4, 5 for each blister size. ISO 4628-1 defines the evaluation system for the number and size of defects caused by coating aging and the degree of uniform change in appearance, and outlines the general principles of the evaluation system. This evaluation system is applicable to defects and uniform changes caused by artificial accelerated aging and natural exposure, such as color changes, for example: yellowing.

GB/T 30789.2-2014 Referenced Document

• ISO 4628-1 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 1: General introduction and designation system*， 2016-01-01 Update

GB/T 30789.2-2014 history

• 2014 GB/T 30789.2-2014 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

GB/T 30789.2-2014 -All Parts