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Spectacular postcards capture 1890s France in vibrant color

The Eiffel Tower and the Trocadero.

Image: Library of Congress

These postcards of France in the last years of the 19th century were created using the Photochrom process, a technique by which black-and-white photos were imbued with vibrant and lifelike color.

Invented in the 1880s by a Swiss printer, the Photochrom process began with coating a tablet of lithographic limestone with a light-sensitive emulsion and exposing it to sunlight under a photo negative for several hours.

The emulsion would then harden in proportion to the tones of the negative, resulting in a fixed lithographic image on the tablet. Read more...

More about History, Retronaut, France, Paris, and Photochrom

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