Category:Photochrom pictures
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Photochrom prints are colorized images produced from black and white photographic negatives via the direct photographic transfer of a negative onto lithographic printing plates. Photochromes have a very sharp image, have natural and realistic colours, and at the bottom they have a serial number and a caption in capital letters. If not, then it is only a hand-colored photograph, not a photochrom.
This process (also called the “Aäc process”) is properly considered a photographic variant of chromolithography, a broader term referring to color lithography in general.
See also category: P.Z. – Photochrom Zürich, then Photoglob Zürich (from the 1880s to World War I).
process for producing colorized images from black-and-white photographies | |||||
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Hohenzollern, leaving the harbor, Venice, Italy LOC 4755191880.jpg 1.024x773; 137 KB