Patent ID: 8721392

Claim:
A method for finishing an edge of a glass sheet having a thickness Th(gs) a first major surface, a second major surface, and a first pre-finishing edge surface connecting the first major surface with the second major surface, a first corner defined by the intersection between the first major surface and the first pre-finishing edge surface, and a second corner defined by the intersection between the second major surface and the first pre-finishing edge surface, comprising the following steps: (I) grinding the first pre-finishing edge surface, the first corner and the second corner with a grinding wheel to obtain a curved first ground edge surface with substantially no sharp corner having an as-ground maximal sub-surface crack length MCL(g), an as-ground average sub-surface crack length ACL(g), and an as-ground normalized average number of sub-surface cracks ANC(g); and subsequently (II) polishing the curved first ground edge surface with a polishing wheel to obtain a first polished edge surface having an as-polished maximal sub-surface crack length MCL(p), an as-polished average sub-surface crack length ACL(p), and an as-polished normalized average number of sub-surface cracks ANC(p); wherein the grinding step and the polishing step are performed such that MCL(p)/MCL(g)≦¾, ACL(p)/ACL(g)≦¾, and ANC(p)/ANC(g)≦¾.