There are three types of polishing cloths: woven, non-woven, and flocked. Woven cloths offer hard surface polishing properties and guarantee flat pre-polishing, without deterioration of the edges. Non-woven cloths are used on very hard materials for high precision surface finishing such as glass, quartz, sapphire, and semi-conductors. Flocked cloths guarantee a super-polished finish. The polishing duration must be as short as possible, to avoid inclusions from being extracted.