Daguerreotypes are sharply defined, highly reflective, one-of-a-kind photographs on silvercoated copper plates, usually packaged behind glass and kept in protective cases. The first commercially successful photographic process, the daguerreotype was popular through the 1840s and into the 1850s, especially for portrait photography. They were primarily replaced by less-expensive ambrotypes and tintypes, as well as by the improved negative-positive techniques of collodion-on-glass negatives and albumen silver prints.
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