Thick Solid Zinc Polishing Lap boasts an advantage over some other tin Laps as it avoids the common issue of developing an orange peel surface. It features a 1/2" arbor hole. Tin and its alloys belong to a class of materials with recrystallization temperatures below room temperature. This characteristic prevents them from work hardening at room temperature, a crucial factor when embedding diamonds into a lapping plate. Because the lapping material doesn't work harden during the charging process, it allows diamonds to embed effectively. The challenge with many low recrystallization metals and alloys is that they struggle to securely hold diamonds. However, Tin TAC-3000 and tin-antimony lapping plate tackle this issue by maintaining a tightly controlled grain structure. Consequently, the embedded diamonds are pinned at the grain boundaries, preventing smearing and rolling. This results in a fixed diamond lapping process that offers lower cutting profiles, more efficient cutting (with energy applied to cutting rather than rolling), less wear on the lapping plates, and a finish reminiscent of a polished surface.
For professional cutters, the Solid Zinc Polishing Lap has long been the lap of choice. It surpasses tin in hardness and excels at rapidly producing flat facets on even the hardest of colored stones. Moreover, Solid Zinc Polishing Lap can achieve a good polish on a wide range of stones, from hard to soft. Additionally, these full-thickness Solid Zinc Polishing Lap are robust enough to serve as standalone laps without the need for bonding to a base plate or require a master lap base. They can even be re-machined if necessary. These Lap are particularly preferred for Polishing tougher gems like corundum and cubic zirconia.
The Perfect Solid Zinc Polishing Lap are meticulously crafted using top-quality industrial-grade Zinc. This ensures dimensional accuracy and corrosion resistance. These Laps are especially ideal for polishing facet-grade soft stones.
The new Solid Zinc Polishing Lap 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.
