Lapping Films

Lapping Films – Precision Diamond & Aluminum Oxide Films for Lapidary

Professional lapping films for precision lapidary polishing, faceting, and optical finishing. Diamond and aluminum oxide lapping films deliver ultra-consistent abrasive surfaces for fine pre-polish and final polish stages — ideal for faceting machines, flat lap systems, and precision optical grinding where surface flatness and finish quality are critical.

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Film Types

Type Grit / Micron Application Notes
Diamond Lapping Film 60–0.1 micron Faceting pre-polish and final polish Consistent diamond particle size for repeatable results
Aluminum Oxide Film 30–0.3 micron Soft gemstone polishing, optical finishing Gentle abrasive for delicate materials
Silicon Carbide Film 60–5 micron Coarse lapping, initial surface prep Fast stock removal on flat surfaces

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Frequently Asked Questions

  • Q: What are lapping films used for in lapidary?
    A: Lapping films are used for precision pre-polish and final polish stages in faceting and flat lap work. They provide a highly consistent abrasive surface that produces repeatable, high-quality finishes on gemstones.
  • Q: What is the difference between diamond and aluminum oxide lapping films?
    A: Diamond lapping films cut faster and last longer, making them ideal for hard gemstones (quartz, topaz, sapphire). Aluminum oxide films are gentler and better suited for softer stones and optical materials where minimal surface damage is required.
  • Q: How do I use lapping films on a flat lap machine?
    A: Lapping films are typically placed on a glass or metal master lap with water or a light lubricant. The film is held in place by surface tension or a backing adhesive. Use progressively finer grits from coarse to final polish.
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