LensGuard 503 Eyewear Hardcoat High Bayer - Non Tintable BRILLIANT THINKING INNOVATIVE COATINGS TECHNICAL DATA (PC) Bayer Ratio (a) 11.00 Steel Wool Scratch Resistance (b) 2 psi Taber Abrasion Test (ASTM1044) (c) 100 cycles — 3.00 500 cycles — 8.00 Pencil Hardness Test (ASTM D 3363, modified) (d) B (a)-500 g of abrasive media, 600 cycles (b)-steel wool #0000, 5 rotations, no scratch (c)-500 g, CS 10 wheels (d)-Mitsu-Bishi Hi Uni pencils, Wolf-Wilburn Method — 1000 g @ 45 degrees PDF Download Optical Coatings All Coatings