The carte de visite was a type of small photograph which was patented in Paris, France by photographer André Adolphe Eugène Disdéri in 1854, although first used by Louis Dodero.It was usually made of an albumen print, which was a thin paper photograph mounted on a thicker paper card. The size of a carte de visite is 54.0 mm (2.125 in) × 89 mm (3.5 in) mounted on a card sized 64 mm (2.5 in) × 100 mm (4 in). In 1854, Disdéri had also patented a method of taking eight separate negatives on a single plate, which reduced production costs. The Carte de Visite was slow to gain widespead use until 1859, when Disdéri published Emperor Napoleon III's photos in this format.This made the format an overnight success, and the new invention was so popular it was known as "cardomania"& eventually spread throughout the world.
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