Claim: James Ambrose Cutting took out three patents in 1854 for improvements in the collodion process used to make Ambrotypes.
Evidence: In 1854, Cutting took out three patents relating to the process of creating images on glass using the wet plate collodion process. To create an ambrotype, the photographer sensitized a polished plate of glass by the wet plate collodion process and exposed the plate in a camera to produce a negative image.