Ambrotype
- Ambrotype
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L’ambrotype est un procédé photographique élaboré par James Ambrose Cutting en 1854 et qui a concurrencé le daguerréotype en raison de la rapidité d'obtention des images (2 à 4 secondes) et de son prix de revient peu coûteux.
Technique : négatif sur plaque de verre au collodion, sous-exposé à la prise de vue, puis blanchi chimiquement au développement. Posée sur un fond noir, l'image apparaît en positif. Très utilisé pour les portraits et les paysages, l'ambrotype se présente généralement encadré comme le daguerréotype.
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Exemple d'ambrotype, vers 1860
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Ambrotype d'un vétéran et sa femme dans les années 1860
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Démonstration de l'effet du fond noir
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Voir aussi
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Contenu soumis à la licence CC-BY-SA. Source : Article Ambrotype de Wikipédia en français (auteurs)
Regardez d'autres dictionnaires:
ambrotype — (n.) 1855, American English, apparently from Gk. ambrotos immortal, imperishable (see AMBROSIA (Cf. ambrosia)), with second element from DAGUERREOTYPE (Cf. daguerreotype). A type of photograph on glass with lights given by silver and shades by a… … Etymology dictionary
Ambrotype — Am bro*type ( t[imac]p), n. [Gr. a mbrotos immortal + type.] (Photog.) A picture taken on a plate of prepared glass, in which the lights are represented in silver, and the shades are produced by a dark background visible through the unsilvered… … The Collaborative International Dictionary of English
ambrotype — ☆ ambrotype [am′brō tīp΄, am′brətīp΄ ] n. [< Gr ambrotos, immortal (see AMBROSIA) + TYPE] an early kind of photograph, consisting of a glass negative backed by a dark surface so as to appear positive … English World dictionary
Ambrotype — The ambrotype process (from Greek ambrotos , immortal ) or amphitype is a photographic process that creates a positive photographic image on a sheet of glass using the wet plate collodion process. It was patented in 1854 by James Ambrose Cutting… … Wikipedia
ambrotype — noun Etymology: Greek ambrotos + English type Date: 1858 a positive picture made of a photographic negative on glass backed by a dark surface … New Collegiate Dictionary
ambrotype — /am breuh tuyp /, n. Photog. an early type of photograph, made by placing a glass negative against a dark background. [1850 55, Amer.; < Gk ámbro(tos) immortal (see AMBROSIA) + TYPE] * * * … Universalium
ambrotype — noun an early type of photograph in which a glass negative appears positive when displayed on a black background … Wiktionary
ambrotype — n. photograph produced on a plate of glass in which light portions are represented in silver and dark portions as the clear glass placed against a black background (Art) … English contemporary dictionary
Ambrotype — A photographic process introduced in 1851 52, which quickly replaced the earlier daguerreotypes because they were cheaper and easier to view. It used weak collodion negatives which were then bleached and backed by a black background which… … Glossary of Art Terms
ambrotype — am·bro·type … English syllables
