Silver Casting Polishing Problems: Strong Fixes for Roughness

Summary for silver casting polishing Discussion

silver casting/polishing problems are discussed as a likely process issue rather than something to fix only with finishing media. Sayed Salim Ali of Mumbai reports a rough surface and tiny porosity in silver karat castings and says that even using maximum pure gold in casting and grinding with 10 mm plastic cones and pyramids has not helped. He asks for furnace and casting parameters and a grinding agent. In reply, the answerer says that if manufacturing were done properly, there should be no need for secondary surface-profile modification, so the first step is to investigate the casting process itself. The reply also notes that plastic media comes in many compositions, and the specific type matters; many suppliers offer several versions of the same size and shape. For the greatest material removal, the answerer recommends a coarse zircon composition.