Restore Old Daguerreotype Photos: Repair Tarnish and Scratches on a Digital Copy

Yes, Restore Old Photos can digitally restore tintypes, ambrotypes, and daguerreotypes, the three principal cased photographic formats of the 19th century.

• Restoring Cased Portraits in Black and White: Restore Old Photos restores tintype, ambrotype, and daguerreotype portraits in black and white from an uploaded scan or photograph. The Restore repair removes scratches, spots, stains, fading, and blur while preserving the portrait’s grayscale appearance and period character.

To identify a daguerreotype photo, look for a polished, mirror-like silver surface on a copper plate, which appears either positive or negative depending on the viewing angle, as the Grand Valley State University Art Museum notes in “Medium: Daguerreotypes.” Comparing the mirror-like silver surface with the materials used in ambrotypes and tintypes helps distinguish the three cased photograph types.

• Daguerreotype Versus Ambrotype: A daguerreotype differs from an ambrotype in its support: the daguerreotype forms a one-of-a-kind image on a polished, silver-coated copper plate, creating a reflective surface that can appear positive or negative depending on the viewing angle. An ambrotype forms an underexposed collodion image on glass; a dark backing makes the ambrotype image appear positive, and the glass surface is generally less reflective.
• Daguerreotype Versus Tintype: A daguerreotype differs from a tintype because the daguerreotype forms its image on a polished, silver-coated copper plate, while a tintype uses a dark-lacquered iron plate with a collodion binder. Daguerreotypes have a mirror-like surface; tintypes generally appear duller against their dark support.
• The 1839 Process Behind Every Plate: The 1839 daguerreotype process, announced in France, formed a direct-positive image by sensitizing a polished, silver-coated copper plate with iodine, exposing the plate in a camera, developing the image with mercury vapor, and fixing it with salt or sodium thiosulfate, as documented in “An A to Z of photographic processes” by the Victoria and Albert Museum, 2026, and in “Daguerreotype Process: 1840–1860s” by The Historic New Orleans Collection.

No, do not clean a tarnished daguerreotype at home because wiping or applying chemicals can damage its fragile silver–mercury image surface. The National Park Service warns against touching the surface of daguerreotypes or trying to clean them in “Caring For Photographs: Special Monochrome Processes” (Conserve O Gram 14/7) by Diane Vogt-O'Connor, April 1998. Consult a trained conservator before removing a daguerreotype from its original case, as the University of Illinois Preservation Self-Assessment Program advises in “Daguerreotypes.”

• Capturing Cased Images for a Family Archive: Capturing cased images for a family archive means photographing daguerreotypes and other cased images while the cases remain closed, using even, indirect light to reduce glare on the cover glass. Support each case securely, and do not force its hinges or remove the glass.