Lapping film

Lapping film, in telecommunications, is a precision coated abrasive consumable mainly used for processing and polishing optical fiber connectors.^[1] It is made from a polyester base sheet, coated with precisely graded minerals^[2] such as diamond,^[3] aluminium oxide,^[4] silicon carbide, silicon oxide or cerium oxide.^[5] Lapping film is designed to provide a uniform, consistent finish on optical fiber connector end tips to ensure efficient light/signal transmission.^[3] It is available in 0.01-45 μm grades, with or without pressure-sensitive adhesive (PSA) backing.^{[citation needed]}