| http://www.w3.org/ns/prov#value | - The first examples appeared in 1839-40; by 1855, the process had mostly died out, replaced with newer, less expensive (and less toxic) methods: ambrotypes, tintypes, and wet-plate glass.To make a daguerreotype, you needed a highly polished copper plate, upon which was electroplated a thin layer of silver.
|
