For an optical surface to be properly prepared, the amount of material removed during polishing must be greater
than the volume of grinding damage. An intermediate stage between loose abrasive grinding and polishing can
reduce the total volume of subsurface damage. This results in less time and expense needed during the polishing
phase. We have characterized the Prestos's coefficient and subsurface damage depth for 3M Trizact™ diamond
tile pads and believe it can fit this intermediary role. Trizact shows a sizeable reduction in the overall subsurface
damage compared to similar sized loose abrasives. This understanding of the abrasive behavior allows us to
create a better grinding schedule that more efficiently removes material and finishing with less overall damage
than traditional loose abrasives.