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Marker pen
A marker pen, fineliner, marking pen, felt-tip marker, felt-tip pen, flow, marker or texta (in Australia) or sketch pen (in India), is a pen which has its own ink-source, and a tip made of porous, pressed fibers such as felt. A permanent marker consists of a container (glass, aluminum or plastic) and a core of an absorbent material. This filling serves as a carrier for the ink. The upper part of the marker contains the nib that was made in earlier time of a hard felt material, and a cap to prevent the marker from drying out. Until the early 1990s the most common solvents that were used for the ink were toluene and xylene. These two substances are both harmful and characterized by a very strong smell. Today, the ink is usually made on the basis of alcohols (e.g. 1-propanol, 1-butanol, diacetone alcohol and cresols).
==History==
Lee Newman patented a felt-tipped marking pen in 1910.〔Lee W. Newman, Marking Pen, (U.S. Patent 946,149 ). January 11, 1910.〕 In 1926 Benjamin Paskach patented a "fountain paintbrush" as he called it which consisted of a sponge-tipped handle containing various paint colors. Markers of this sort began to be popularized with the sale of Sidney Rosenthal's Magic Marker (1953) which consisted of a glass tube of ink with a felt wick. By 1958 use of felt-tipped markers was commonplace for a variety of applications such as lettering, labeling, and creating posters.〔(History of Pens & Writing Instruments ), About Inventors site. Retrieved March 11, 2007.〕 The year 1962 brought the development of the modern fiber-tipped pen (in contrast to the marker, which generally has a thicker point) by Yukio Horie of the Tokyo Stationery Company.
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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