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The cyanotype process has remained virtually unchanged since its invention. The cyanotype was one of the first non-silver technologies used to create photographic images.
Originating in the 1840's, it was not initially utilized in mainstream photography, but instead was adopted as a copying technique, becoming known by the term "blueprint" with regard to its blue background reproductions of large architectural and mechanical drawings.
Two chemical solutions are prepared to initiate the two-part sensitizing process. Material covered with the solution is then printed using ultraviolet light, then washed in water to remove any unexposed emulsion, and finally dried.
Cyanotype is the most archivally durable photographic process. It will keep an image pristine, whereas black-and-white fiber-based prints will deteriorate almost completely.
Cyanotype prints are some of the most permanent prints available on the market and represent a lasting investment.
MORE ON THE PROCESS
AlternativePhotography.com
AlternativePhotography.com
- Historical photographic methods in use today - the art, the processes
and the techniques of alternative photography. Techniques and
processes, photographers’ gallery, articles and forums and specialist
literature.
Mike Wire Alternative Photography
A
site which reflects Mike Wire’s interest in the Science, History and
Art of the so-called "Alternative" Photographic Processes. Excellent
resource for any alternative processes, but a bible for cyanotype!
Please check Conservation matters on Cyanotype archival issues:
http://www.mikeware.co.uk/mikeware/conservation.html