perforation

Japanese: perforation
perforation

… Perforations are small holes made on all four sides of a stamp to separate it from the sheet. In English, they are called perforations, or perf for short. A stamp without holes is called an imperf, one with the corners missing is called a missing perforation, and one with the perforation misaligned from the correct position is called a misaligned perforation.

*Some terminology explanations that mention "perforation" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… 目打(めうち)切手をシートから分離するため四方にあけられた小さい穴のこと。英語でパーフォレーションperforation,略してパーフperfともいう。この穴のないものを無目打imperf,角の目打のとれたものを目打欠,目打が正しい位置からずれているものを目打ずれという。…

※「perforation」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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