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from the group: Carbro

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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:

Color carbro was used primarily for proofing color reproductions for advertisements and magazines. This example, dated August 11, 1949, was likely made for a fashion advertisement.

Carbro is similar to the carbon process except that the pigmented sheets of dichromated gelatin harden in contact with a silver gelatin bromide print; the gelatin hardens in proportion to the amount of silver present in the print. After printing the gelatin sheets are transferred to a temporary support and washed in warm water, which dissolves the unhardened gelatin resulting in an image in gelatin relief. The name “carbro” is derived from the combination of carbon and bromide. Color carbro is a subtractive color assembly process. The color image is composed of three superimposed subtractive color (cyan, magenta, yellow) pigmented gelatin reliefs on a paper support.