Photograph courtesy of Camera Victorian Eyewitness by Gus Macdonald ISBN 0 7134 2095 2
A sample of a Daguerreotype. The silver surface is protected by mounting in a sandwich of the backing, gold vingette and glass then held in a tooled leather folder or sometimes a moulded bakelite holder. If the silver surface was touched or contaminated with moisture or any other substance the image would be destroyed.