ferrotype

詳細解釋：

fer.ro.type

n.（名詞）
A positive photograph made directly on an iron plate varnished with a thin sensitized film.Also called tintype
鐵版照相：直接在用感光底片上了光的鐵盤上製成的相片正像也作 tintype
The process by which such photographs are made.
鐵版照相法：製作這種照片的過程