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from the group: Intaglio

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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:

This is a book illustration by Gerard van der Gucht (ca. 1695-1776) depicting Joan of Arc. Notice how the various line densities create depth. This variety in density is created by a common etching technique known as progressive stopping out. The technique begins with a wax-coated plate. An etching needle is used to scratch away portions of the wax (known as a ground). The plate is etched lightly with acid, which eats away the metal where wax is absent. The plate is then removed from the acid and washed and dried, after which certain areas of the etched design are covered with a protective coat of varnish. The plate is then returned to the acid and any exposed areas are etched again. Ultimately, different amounts of ink are transferred to the paper in proportion to the depth of these lines.