Tintypes (circa 1855)The Ferrotype process (tintypes) was introduced in the United States in 1855. It substituted an iron plate for glass and was even cheaper than the ambrotype. Because tintypes were placed in albums along with CDVs, they were often trimmed at the sides and corners. Tintypes were produced in various sizes
Gem tintype ca 1860s. A Gem tintype could be 3/4" to 1" wide. Carte de visite sized card mounts (2½"x4") enclosed the gem and the finished item was known as a carte de visite tintype or ferrotype
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