The pencil hardness test as per ASTM D 3363, AS 1580.405.1, ISO 15184:1998 ISO 15184, ASTM D3363, JIS K-5600, ECCA-T4-1, BS 3900-E19, SNV 37113, SIS 184187, NEN 5350, MIL C 27 227 and NCCA II-12, also referred to as the Wolff-Wilborn test, uses the varying hardness values of graphite pencils to evaluate a coating’s hardness.
Watch the testing video:
Watch the testing video:
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