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Ink eraser
An ink eraser is an instrument used to remove ink from a writing surface, more difficult than removing pencil markings. Older types are a metal scraper, which literally scrapes the ink off the surface, and an eraser similar to a rubber pencil eraser, but with additional abrasives, such as sand, incorporated.〔(【引用サイトリンク】title=Tombow Mono Sand & Rubber Eraser )〕 Fibreglass erasers also work by abrasion. These erasers physically remove the ink from the paper. There is some unavoidable damage with most types of paper and ink, where the paper absorbs some ink.
The chemical ink eradicator contains a substance that reacts with some inks removing their pigmentation and hiding the writing.〔(【引用サイトリンク】title=Ink eradicators )〕
== Metal ink erasers ==
Metal ink erasers were generally used before chemical ink erasers were introduced, and when permanent writing was done in ink. The erasers were essentially small knives, and they were occasionally used as weapons.〔("Stabbed to Death in Office Frolic," New York Times, February 16, 1909. )〕〔("Bang Knocked Him Down: How Coles was Provoked to Stab Coachman Flanagan," New York Times, June 26, 1886. )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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