The film's hardness is determined using the Wolff-Wilborn pencil test in line with ISO 15184 and ASTM D3363.
Quickly and easily evaluate the scratch resistance and relative hardness of coatings
14 quality graphite pencils—6B to 6H hardness values in a protective case
Custom aluminum pencil sharpener specifically designed for the Pencil Hardness Test—includes 5 and 6 mm reference marks for precision graphite length
Comes complete with everything needed for testing
Optional Pencil Cart exerts a constant force of 7.35 N (~1.65 lbf) at the specified 45° angle (included with Complete Kit)
Conforms to ISO 15184, ASTM D3363, JIS K-5600, BS 3900-E19, MIL C 27 227, ECCA-T4-1, SNV 37113, SIS184187, NEN 5350