![]() ![]() Boiled and dried, the rough horsetail plant is used in Japan as a traditional polishing material, finer than sandpaper. Shark skin ( placoid scales) has also been used as an abrasive, and the rough scales of the Coelacanth are used for the same purpose by the natives of Comoros. The first recorded instance of sandpaper was in 13th-century China when crushed shells, seeds, and sand were bonded to parchment using natural gum. Please do not remove this message until the described events are arranged in an unambiguous forward-chronological sequence. Relevant discussion may be found on the talk page. This section lists events whose chronological order is ambiguous, backward, or otherwise incorrect. A small number such as 20 or 40 indicates a coarse grit, while a large number such as 1500 indicates a fine grit. ![]() The grit size of sandpaper is usually stated as a number that is inversely related to the particle size. Sandpaper is produced in a range of grit sizes and is used to remove material from surfaces, whether to make them smoother (for example, in painting and wood finishing), to remove a layer of material (such as old paint), or sometimes to make the surface rougher (for example, as a preparation for gluing). There are many varieties of sandpaper, with variations in the paper or backing, the material used for the grit, grit size, and the bond. "aluminium oxide paper", or "silicon carbide paper". It is common to use the name of the abrasive when describing the paper, e.g. In the modern manufacture of these products, sand and glass have been replaced by other abrasives such as aluminium oxide or silicon carbide. Sandpaper, also known as glasspaper or as coated abrasive, is a type of material that consists of sheets of paper or cloth with an abrasive substance glued to one face. Sheets of sandpaper with different grit sizes (40 (coarse), 80, 150, 240, 600 (fine)). Please consider expanding the lead to provide an accessible overview of all important aspects of the article. This article's lead section may be too short to adequately summarize the key points.
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