LBTEK Fiber Optic Polishing (Lapping) Films come in 5 types, all with a standard size of 152 mm × 152 mm. For fiber optic polishing, a five-step polishing process is recommended: the first four steps use diamond lapping films with particle sizes of 30 µm, 6 µm, 3 µm, and 1 µm respectively, while the fifth step employs a silica film with a particle size of 0.02 µm. Distilled water should be applied to the film, and an appropriate polishing pad should be selected to perform figure-8 motion polishing. The silica film is manufactured by coating high-precision silica particles, featuring a highly smooth surface with minimal scratches, and it does not contaminate optical fibers during the polishing process.