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Overview ISO 4628-7:2016 - Paints and varnishes - Assessment of degree of chalking by velvet method - specifies a visual/physical test for chalking (formation of loosely adherent powder) on exterior…
Overview EN ISO 4628-7:2016 (ISO 4628-7:2016) - published by CEN - defines the velvet method for assessing the degree of chalking on exterior paints and varnishes. The method is intended mainly for r…