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How were ambrotypes different from daguerreotypes?
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History of photography
Child with Striped Dress (Younger Raab Child), autochrome photograph by Alfred Stieglitz, 1907; in the Art Institute of Chicago.
The daguerreotype and the ambrotype were both popular forms of 19th-century portraiture, but they relied on fundamentally different technical processes.
- Composition: A daguerreotype is a unique image formed on a silver-coated copper plate. In contrast, an ambrotype is a glass-plate negative that appears as a positive image when placed against a dark backing, such as black paper or velvet.123
- Visual Quality: While ambrotypes were designed to mimic the sizes, lighting, and posing styles of daguerreotypes, they did not achieve the same level of image brilliancy as the earlier daguerreotype process.24
- Technique: The daguerreotype was the first successful form of photography, utilizing mercury vapor to develop the image. The ambrotype was a product of the wet collodion process, which involved coating glass with a collodion emulsion.123
Both formats were often presented in similar protective cases, though the ambrotype was generally more accessible and less expensive to produce than the daguerreotype.24