In photography, a positive image made directly on an iron plate varnished with a thin photosensitive film; also called a tintype. Or, the process by which they are made. The ferrotype process was introduced to the USA in 1855.(pr. FEH-roh-ti:p)Examples: Unidentified photographer (American?), Woman looking at framed tintype portraits, c. 1870, tintype with decorative paper mat, 12.4 x 7.7 cm, George Eastman House, Rochester, NY. Unidentified Photographer, Man and Childs Hands, c. 1875, tintype, 7.8 x 4.9 cm Eastman Kodak House, Rochester, NY.