ADMIRALTY UV TOP COAT GLOSS ABRASION TEST

ASTM D 968-05 Abrasion Resistance of Organic Coatings by Falling Abrasive

In this test 712 lbs (50 gallons) of natural silica sand falls from a height of 37" in a 0.75" id steel tube onto a coated substrate with the surface positioned at a 45º angle.

A UV Top Coat (Hardness of 5H) is applied to the substrate at a thickness of 0.003" (3 mils).

At the end of the test... (712 lbs of sand), the gloss finish was found to have been affected but... under a 100x power microscope, no reduction of coating thickness was observed.