"most viewed this week on the years"
photo Felice Beato Until the mid-20th century, the majority of photography was monochrome (black and white), as was first exemplified b...
Passe Partout have the mat window design painted on the underside of the cover glass. Accent lines adjacent to the mat window can be paint...
50X One key indicator of the photogravure process is a fine aquatint grain. This can often be seen with the low magnification of a lou...
Abrasion due to storage with other items causes pieces of the emulsion (image) to flake off. Humidity in the air the...
the Tapada phenomenon symbolised women's freedom and indipendence for three centuries 1560-1850 the cyclope eye allowed women t...
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Thursday, 18 August 2011
Art pour le petit déjeuner
Daguerreotypes, ambrotypes and early tintypes were usually sold in small folding cases. The cases were designed to keep the fragile surfaces of these images safe behind glass. Over the years, the cover glass in the cases can crack or become dirty. Some researchers report the glass itself can deteriorate, causing damage to the surface of daguerreotypes.
Many collectors and conservators choose to replace the old cover glass. This is an operation that requires EXTREME CAUTION. The fragile surface of a daguerreotype was compared to the delicate wings of a butterfly--one inadvertent touch and it will be marred forever. Removing the image from its case also requires care, because a slip can permanently bend a daguerreotype or tintype...or crack an ambrotype. One other potential drawback to replacing the glass: some collectors put a premium on daguerreotypes that have their original paper seals intact. If the seal is present, breaking it to replace the glass may have an impact on the image's market value.!!!
"When in doubt, consult an expert".