also: どうはん
noun
copper plate; copperplate
Refers to a sheet or plate made of copper, often used in engraving or printing.
銅版に細かい模様を彫る。
Engrave a fine pattern on a copper plate.
この絵は銅版画です。
This picture is a copperplate print.
銅板 (どうばん) also means copper plate/sheet, but 銅版 specifically implies a printing plate or engraving plate, while 銅板 is a general term for a copper sheet.
Compound of 銅 (どう, 'copper') and 版 (はん/ばん, 'printing plate' or 'edition'). The reading どうばん is the standard combination, with rendaku voicing of はん to ばん.