page_title: Heliographic copier
section_title: Cyano copier
hierarchical_section_title: Heliographic copier / Cyano copier
caption_attribution_description: English: Joy Gas service station elevation drawings, 910 Lake Shore Road Blvd W., Toronto, Canada.
context_page_description: A heliographic copier or heliographic duplicator is an apparatus used in the world of reprography for making contact prints on paper from original drawings made with that purpose on tracing paper, parchment paper or any other transparent or translucent material using different procedures. In general terms some type of heliographic copier is used for making: Hectographic prints, Ferrogallic prints, Gel-lithographs or Silver halide prints. All of them, until a certain size, can be achieved using a contact printer with an appropriate lamp but for big engineering and architectural plans, the heliographic copiers used with the cyanotype and the diazotype technologies, are of the roller type, which makes them completely different from contact printers.
context_section_description: This is a simple process for the reproduction of any light transmitting document. Engineers and architects used to draw their designs on cartridge paper; these were then traced by hand on to tracing paper using Indian ink, which were kept to be reproduced with the cyano-copier whenever they were needed.
  Introduction of the blueprint process eliminated the high expenses of photolithographic reproduction or of hand-tracing of original drawings. By the latter 1890s in American architectural offices, a blueprint was one-tenth the cost of a hand-traced reproduction. The blueprint process is still used for special artistic and photographic effects, on paper and fabrics.
caption: Architectural drawing, Canada, 1936
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