Extrusion technique

...The small gilt bronze Buddhas handed down from Horyu-ji Temple (Tokyo National Museum), known as the "48 Buddhas," were also made using the same technique. Meanwhile, the "oshidashi" technique, a type of forging technique, was popular from the Hakuho to Nara periods. The copper plate with a thousand Buddhas on the back of the door of Horyu-ji Temple's "Tamamushi Zushi," the Amida Triad, and the monk statues were hammered from the back of the copper plate into the shape of a Buddha, as if stamped. The large extruded Buddhas handed down at Horyu-ji Temple, Toshodai-ji Temple, and other temples were made by placing a thin copper plate on a half-carved cast model, and hammering it from above to give it a relief-like appearance....

*Some of the terminology that refers to "extrusion techniques" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…〈四十八体仏〉と呼ばれる法隆寺伝来の小金銅仏(東京国立博物館)も同じ技法といえる。一方，鍛金技法の一つである押出（おしだし）技法が，白鳳から奈良時代にかけて流行した。法隆寺《玉虫厨子》扉背面の千仏銅板や阿弥陀三尊および比丘形像などは，刻印するように銅板の裏から仏像形で打っており，また法隆寺，唐招提寺などに伝わる大型の押出仏は，半肉彫の鋳造製原型に薄い銅板をのせ，上からたたいて浮彫風に肉付けしている。…

※「押出技法」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