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Gevil or Gewil ((ヘブライ語:גוויל)) is animal hide that has been prepared as a writing material in Jewish scribal documents, in particular a Sefer Torah (Torah scroll). According to most views of Jewish Law, a sefer Torah (scroll) should be written on gevil as was done by Moses for the original Torah scroll he transcribed.〔Talmud, Bava Batra 14b and Gittin 54b〕 Further, a reading of the earliest extant manuscripts of the Mishneh Torah indicate that gevil was halakha derived from Moses and thus required for Torah scrolls.〔Mishnah Torah - Hilkoth Tefillin 1:8〕 Maimonides wrote that it is the law transmitted to Moses on Mount Sinai that a Torah scroll must be written on ''gevil'' or alternatively on ''klaf'' and that scrolls written on an alternative material are invalid for use, however it is preferable that they be written on ''gevil'' (Maimonides, Hilkhoth Tefillin 1:14). ==Definition of ''gevil''== ''Gevil'' is a form of skin made from the whole hide, after the hair is removed. The precise requirements for processing ''gevil'' are laid by the Talmud, Geonim and Rishonim. They were reconfirmed as "the law according to Moses" by Maimonides, in his Mishneh Torah. According to law, the preparation of gevil hide must include salt, flour and ''mey afatzim'' (wasp residue/gall-nut water). Gall nuts—rich in tannic acid—are a tree's reaction to an invasive parasitic wasp's egg; the pure black tint of the ink used on Torahs results from the reaction between the tannic acid and iron sulfate (a powder used to make the ink).〔Shabboth 79a〕 There are three forms of skin known to Jewish law. The other two qualities result from splitting the hide into two layers; however, there is some confusion about their identification. Others deviate from this process, and use modern chemical processes. However, some believe that this invalidates the parchment for scribal use. According to the ''Halakhot Gedolot'', klaf is the inner layer, adjacent to the flesh, while ''dukhsustos'' is the outer layer, on which the hair grows. The same view is expressed in the oldest extant manuscripts and critical editions of Maimonides' Mishneh Torah and the Babylonian Talmud. This is also the same definition which appears in the minor Talmudic tractate called Sofrim. However, more recent authorities reverse the two descriptions, and many printed editions of the Mishneh Torah are "adjusted" to reflect this. The reason for this original adjustment away from the original definition is a mystery. Some suspect that copying errors are to blame. As a result, many have become confused, in terms of which part of the skin should be used for writing. Using the full hide known as gevil for Sifrei Torah does avoid this issue, unfortunately this solution won't work for tefilin which must be written on Klaf and are not kosher if written on gevil. 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「Gevil」の詳細全文を読む スポンサード リンク
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