8"x1/2" Zinc Polishing Lap

Solid Zinc Polishing Lap has long been the lap of choice for professional cutters. Zinc laps are harder than tin and produce flat facets quickly on the hardest of colored stones. Zinc laps can produce a good polish on a wide range of stones from hard to soft. These versatile laps are easy to use and if desired are easily scored with a knife or hacksaw blade.This solid full thickness zinc alloy lap is rigid enough to serve as a single solid lap, without bonding to a base plate or require a master lap base, and can be re-machined if the need arises. These laps are preferred for polishing some of the harder gems such as corundum and cubic zirconia.The new polishing disc needs to add water and use 60-80# sandpaper, polish from the outer edge to the inside, until no scratches are seen, and then polish it with 240# sandpaper, and the same processing procedure after the old disc is repaired. The polishing powder should be moistened with diamond oil to form a paste, and continue polishing on 50-150# sandpaper. The disc needs to maintain a certain humidity. The polishing powder should be applied evenly and polished until the surface is black, then it can be used.