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from the group: Screen Plate

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Pre-photographic

Intaglio
Planographic
Relief

Photomechanical

Collotype
Letterpress
Offset Lithography
Photogravure
Rotogravure
Woodburytype

Photographic

Albumen
Ambrotype
Bromoil
Bromoil Transfer
Carbon
Carbro
Chromogenic
Collodion POP
Cyanotype
Daguerreotype
Direct Carbon (Fresson)
Dye Imbibition
Gelatin Dry Plate
Gelatin POP
Gum Dichromate
Instant (Diffusion Transfer)
Instant (Dye Diffusion Transfer)
Instant (Internal Dye Diffusion Transfer)
Matte Collodion
Platinum
Salted Paper
Screen Plate
Silver Dye Bleach
Silver Gelatin DOP
Tintype
Wet Plate Collodion

Digital

Electrophotography
Inkjet
Thermal

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Notes on this view:

The Autochrome is an additive color screen plate process. It was introduced in 1907 by the Lumiere brothers and was the first commercially successful color photographic process. The Autochrome is composed of a transparent color screen made up of dyed potato starch grains and a panchromatic silver gelatin emulsion on a glass support. The image is taken in the camera so that the light passes through the color screen before striking the emulsion.

All screen plate processes are based on a theory published in 1869 by Louis Ducos du Hauron. The theory used additive color principles, in which Ducos du Hauron proposed that a full color image could be produced by placing a screen made up of additive colored stripes in front of a light sensitive emulsion. The screen would allow only the light corresponding to the colors of the scene to transmit to the emulsion while absorbing the rest.