Silicon Dioxide Lapping Film Discs

Silicon Dioxide Lapping Film Discs – Ultra-Fine SiO₂ Polishing Film for Glass & Optical Surfaces

Our 6" Silicon Dioxide Lapping Film Discs use ultra-fine silicon dioxide (SiO₂) abrasive for the final polishing stages on glass, gemstones, and optical components. Silicon dioxide is a gentle, ultra-fine abrasive that produces exceptionally smooth, scratch-free surfaces — ideal as a final finishing step before cerium oxide polish or as a standalone final polish on delicate optical surfaces where even the finest conventional abrasives leave unacceptable surface roughness.

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Specifications

Specification Detail
Diameter 6"
Abrasive Silicon dioxide (SiO₂)
Backing Flexible polyester film
Stage Ultra-fine finishing / final polish
Applications Glass, gemstones, optical components

Applications

  • Optical surface finishing — Ultra-smooth final polish on lenses, prisms, and optical flats
  • Glass polishing — Final finishing on art glass, fused glass, and precision glass components
  • Gemstone final polish — Ultra-fine pre-polish before cerium oxide on soft to medium stones
  • Fiber optic polishing — Final stage finishing on fiber optic connector end faces
  • Precision surface preparation — Controlled ultra-fine surface roughness for technical applications

Lapping Film Sequence

Stage Film Type Purpose
1. Coarse Silicon Carbide Film Aggressive stock removal
2. Medium-Fine Aluminium Oxide or Diamond Film Surface smoothing and pre-polish
3. Ultra-Fine Silicon Dioxide Film Final surface preparation before optical polish
4. Final Polish Cerium Oxide Film Mirror-quality final polish

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Frequently Asked Questions

  • Q: What is silicon dioxide lapping film used for?
    A: Silicon dioxide lapping film is used for ultra-fine final finishing on glass, optical components, and gemstones. The SiO₂ abrasive is extremely fine and gentle — producing a near-optical surface finish that bridges the gap between conventional fine abrasive films and the final cerium oxide polish stage.
  • Q: How does silicon dioxide film differ from cerium oxide film?
    A: Silicon dioxide film provides ultra-fine mechanical abrasion for surface smoothing. Cerium oxide film adds a chemical-mechanical polishing action on glass that produces the final water-clear mirror finish. Use SiO₂ film as the final pre-polish stage before cerium oxide for the best optical surface quality.
  • Q: Should silicon dioxide lapping film be used wet or dry?
    A: Light wet use is recommended — a few drops of water on the disc surface activates the abrasive and prevents glazing. For optical applications, deionized water is preferred to avoid mineral deposits on the polished surface.