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wax tablet
A wax tablet is a tablet made of wood and covered with a layer of wax, often linked loosely to a cover tablet, as a "double-leaved" diptych. It was used as a reusable and portable writing surface in Antiquity and throughout the Middle Ages. Cicero's letters make passing reference to the use of ''cerae'', and some examples of wax-tablets have been preserved in waterlogged deposits in the Roman fort at Vindolanda on Hadrian's Wall. Medieval wax tablet books are on display in several European museums.
==Technology and applications==
Writing on the wax surface was performed with a pointed instrument, a stylus. Writing by engraving in wax required the application of much more pressure and traction than would be necessary with ink on parchment or papyrus,〔Paper, a Chinese invention, did not reach the West until the Middle Ages: see history of paper.〕 and the scribe had to lift the stylus in order to change the direction of the stroke. Therefore the stylus could not be applied with the same degree of dexterity as a pen. A straight-edged, spatula-like implement (often placed on the opposite end of the stylus tip) would be used in a razor-like fashion to serve as an eraser. The entire tablet could be erased for reuse by warming it to about 50 °C and smoothing the softened wax surface. The modern expression of ''"a clean slate"'' equates to the Latin expression ''"tabula rasa"''.
Wax tablets were used for a variety of purposes, from taking down students' or secretaries' notes to recording business accounts. Early forms of shorthand were used too.
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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