Describes a method for assessing the degree of cracking of coatings by comparison with pictorial standards, using the designation system defined in SANS 4628-1. SANS 4628-1 defines the 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. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes such as colour changes, for example yellowing.
Số hiệu tiêu chuẩn
SANS 4628-4:2004*SABS ISO 4628-4:2004
Tên tiêu chuẩn
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
Ngày phát hành
2004-10-29
Tiêu chuẩn tương đương
ISO 4628-4 2003 IDT
Tiêu chuẩn liên quan
ISO 4628-1
Thay thế cho
SANS 4628-4:1982
Từ khóa
APPEARANCE * COATING MATERIALS * COATINGS * COLOUR * CRACKING * DEFECTS * DEGRADATION * DESIGNATIONS * EVALUATIONS * INSPECTION * LACQUERS * NON-DESTRUCTIVE TESTS * PAINTS * SURFACE DEFECTS * TESTING * VARNISHES * VISUAL INSPECTION (TESTING) * Hues * Cracking * Inspection * Degradation * Shortage * Coatings * Evaluations * Varnishes * Coating materials * Colour * Appearance * Surface defects * Designations * Paints * Lacquers * Flatwork ironers * Testing * Visual inspection (testing) * Defects
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