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glitter
Glitter describes an assortment of small, flat, reflective particles. Glitter particles reflect light at different angles, causing the surface to sparkle or shimmer. Glitter is like confetti or sequins, but somewhat smaller. Since prehistoric times, glitter has been made and used as decoration, from many different materials including stones such as malachite,〔 galena,〔 mica, insects,〔(【引用サイトリンク】 url=http://factsanddetails.com/world.php?itemid=1938&catid=56&subcatid=365 )〕 and glass. Modern glitter is usually manufactured from plastic.
==Modern glitter==
The first production of modern plastic glitter is credited to the American machinist Henry Ruschmann who found a way to cut sheets into glitter in 1934.〔 During World War II with German glass glitter unavailable, Ruschmann found a market for scrap material ground into glitter made of plastics.〔〔(【引用サイトリンク】 url=http://www.etsy.com/blog/en/2011/all-that-glitters-the-history-of-shiny-things )〕 He founded Meadowbrook Inventions, Inc. in Bernardsville, New Jersey, and the company is still a producer of industrial glitter.〔(【引用サイトリンク】 url=http://www.meadowbrookglitter.com/hiband/company.html )〕 Decades later he filed a patent for a mechanism for cross-cutting films as well as other related inventions.
Today over 20,000 varieties of glitter are manufactured in a vast number of different colors, sizes, and materials.〔(【引用サイトリンク】 url=http://www.meadowbrookinventions.com/common/presentation/presentation.html )〕 Over of glitter was purchased between the years of 1989 and 2009 alone. Commercial glitter ranges in size from to .〔(【引用サイトリンク】 url=http://www.meadowbrookglitter.com/hiband/size-chart.html )〕 First, flat multi-layered sheets are produced combining plastic, coloring, and reflective material such as aluminium, titanium dioxide, iron oxide, and bismuth oxychloride. These sheets are then cut into tiny particles of many shapes including squares, rectangles, and hexagons.〔
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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