UNE-EN ISO 4628-1:2016

Foreword
1 Scope
2 General principles of the designation system
3 Assessment of defects and of intensity of changes
   3.1 General
   3.2 Designation of quantity of defects
   3.3 Designation of size of defects
   3.4 Designation of intensity of changes
4 Expression of results
5 Test report

This part of ISO 4624 defines a system for designating the quantity and size of defects and the intensity of changes in appearance of coatings and outlines the general principles of the system used throughout ISO 4628. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes, for example yellowing.The other parts of ISO 4628 provide pictorial standards or other means for evaluating particular types of defect. As far as possible, already existing evaluation schemes have been used as the basis.This part of ISO 4628 is also used for assessing defects not covered by the other parts of ISO 4628.