vellum

…There is a difference in the density of the skin between adult and young animals, with young animals being of better quality. In the past, high-quality calfskin was called vellum, and the very high-quality hides made from the skins of fetal sheep or young sheep immediately after birth were called uterine vellum. Even today, thin, high-quality hides are called vellum. …

*Some of the terminology that mentions "vellum" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…成獣と幼獣皮では肌の粗密に差があり，幼獣の方が良品である。古くは子牛皮の高級品をベラムvellum，羊の胎児または出産直後の幼獣の皮を使った超高級品をウテリン･ベラムuterine vellumと呼んだ。現代でも薄手の高級品をベラムという。…

※「vellum」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