8"x1/2" Tin Polishing Faceting Plate Lap Disc , little scratch

An 10mm thick  Tin Lapping Polishing Faceting  lap will not develop an orange peel surface common with some other tin laps. 1/2" arbor hole.Tin and its alloys are a class of materials, which have recrystallization temperatures below room temperature. This means that they do not work harden at room temperature. This is very important for embedding diamondinto a lapping plate because the lapping material will not work harden during the charging process, thus allowing the diamondto embed into the lapping plate. The problem with most of these low recrystallization metals and alloys is that they do not effectively hold the diamond. The tin  lapping plates get around this problem by having a very tightly controlled grain structure. As a result the embedded diamondgets pinned at the grain boundaries, which prevents the diamond from smearing and rolling. Thus the tin  lapping plates produce a fixed diamond lapping process.Fixed diamondlapping processes have lower cuttingprofiles, are more efficient cutters (energy is applied to cuttingvs. rolling), produce less wear on the lapping plates, and cut .The result is more characteristic of a polished surface.