LensGuard 505 Optimum Eyewear Hardcoat Non Tintable BRILLIANT THINKING INNOVATIVE COATINGS TECHNICAL DATA (PC) Bayer Ratio (a) 7.00 Steel Wool Scratch Resistance (b) 10 psi Taber Abrasion Test (ASTM1044) (c) 100 cycles — 4.00 500 cycles — 4.50 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