Graphics Atlas: Guided Tour

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from the group: Collotype

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Pre-photographic

Intaglio

Planographic

Relief

Photomechanical

Collotype

Letterpress

Offset Lithography

Offset Lithograph (Halftone Postcard)

Photogravure

Rotogravure

Woodburytype

Photographic

Albumen

Ambrotype

Bromoil

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:

In the early 1880s Friedrich Carl Hoesch invented a new method for making color collotypes called Hoeschotypes. Often utilized to reproduce paintings, the process used only five colors: yellow, red, blue, gray, and black, which could be combined to make over 1,600 shades. These early color collotypes were made in a similar manner as chromolithographs (color lithographs).

First the painting was photographed and the negative printed. Using a specially made color scale as a reference, an artist would use a wash of grey ink to mark up the print where there ought to be yellow and in the proper density corresponding to the painting. Where there was an absence of yellow, an opaque white paint was used. This print was then photographed and the negative printed onto a glass plate coated with dichromated gelatin. After processing in the collotype manner, the plate was inked with yellow ink and printed. This process was repeated for the other colors which were all printed in register on a single sheet of paper producing a color image. By the end of the 19th century color collotypes were made following color photographic theory using three subtractive primary colors and color separations.