noun
photographic plate; photogravure plate; photostat
Technical term in printing and photography for a plate or print made by a photographic process. Covers both the physical plate and the resulting print.
この本の挿絵は写真版で印刷されている。
The illustrations in this book are printed by photogravure.
古い写真版をデジタル化して保存する。
Digitize and preserve old photographic plates.
グラビア is a more common term for photogravure, especially in magazine printing, while 写真版 is a broader technical term.
Compound of 写真 (photograph) and 版 (printing plate/edition). A straightforward technical coinage from the late 19th or early 20th century.