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A Post-it note (or sticky note) is a small piece of paper with a re-adherable strip of glue on its back, made for temporarily attaching notes to documents and other surfaces. A unique low-tack pressure-sensitive adhesive allows the notes to be easily attached, removed and even re-posted elsewhere without leaving residue. Originally small yellow squares, Post-it notes and related products are now available in a wide range of colors, shapes and sizes. Although 3M's patent ran out in 1997, "Post-it" and the original notes' distinctive yellow color remain registered company trademarks, with terms such as "repositionable notes" used for similar offerings manufactured by competitors. Despite this, the name has become genericized for all such products in many countries. ==History== In 1968, a scientist at 3M in the United States, Dr. Spencer Silver, was attempting to develop a super-strong adhesive. Instead he accidentally created a "low-tack", reusable, pressure-sensitive adhesive.〔(【引用サイトリンク】title=Post-it® Brand )〕〔(【引用サイトリンク】title=About Post-it® Brand )〕 For five years, Silver promoted his "solution without a problem" within 3M both informally and through seminars but failed to gain acceptance. In 1974 a colleague who had attended one of his seminars, Art Fry, came up with the idea of using the adhesive to anchor his bookmark in his hymnbook.〔(【引用サイトリンク】title=Inventor of the Week: Art Fry and Spencer Silver )〕 Fry then utilized 3M's officially sanctioned "permitted bootlegging" policy to develop the idea.〔 The original notes' yellow color was chosen by accident, as the lab next-door to the Post-it team had only yellow scrap paper to use.〔(【引用サイトリンク】title=Why Are Post-it Notes Yellow? )〕 3M launched the product as "Press 'n Peel" in stores in four cities in 1977, but results were disappointing.〔(【引用サイトリンク】title=TV News Headlines - Yahoo TV )〕 A year later 3M instead issued free samples directly to consumers in Boise, Idaho, with 94 percent of those who tried them indicating they would buy the product.〔 On April 6, 1980, "Press 'n Peel" was re-introduced in US stores as "Post-It Notes".〔(【引用サイトリンク】title=Spencer Silver )〕 The following year they were launched in Canada and Europe.〔(【引用サイトリンク】title=The Evolution of the Post-it Note )〕 In 2003, the company came out with "Post-it Brand Super Sticky Notes", with a stronger glue that adheres better to vertical and non-smooth surfaces. Until 3M's patent expired in the 1990s, post-it type notes were produced only in the company's plant in Cynthiana, Kentucky. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Post-it note」の詳細全文を読む スポンサード リンク
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