Popular Photographic Print Processes:
Tintypes (Ferrotypes, Melainotypes, Melanographs)
general use: ca. 1856-1930s
Description: The tintype is similar to the daguerreotype and ambrotype, since it is an image formed directly on a sheet of metal (a positive), and is sometimes found in a case. The sheet of metal serves the same function as the dark material used in ambrotypes to cause the image to appear positive. The image is reversed left-to-right. The tintype was a cheaper alternative to paper prints made from a negative.
Further information and examples
Print Processes Introduction and Table