Identification

from the group: Iron-Based

Cyanotypes

common use: 1840-1920

Image Tone

Cyanotypes are immediately recognizable by their cyan image color. The process has been used to produce photographs, but it was also notably the process used to produce architectural and design blue prints. While most prints of this color are cyanotypes, photo-mechanical prints and even photographic prints of different processes have been produced in a similar color.

(click to enlarge) (click to enlarge)
 

Sheen

Cyanotypes are always matte, because they have no binder layer and thus retain all of the surface qualities of the paper they were produced on.

 

Cyanotype exhibiting almost no reflectance when moved in and out of a light path.

Layer Structure

Cyanotypes are made on papers without a surface coating such as a baryta layer. Due to the absence of such a layer paper fibers can be clearly seen under relatively low magnification.

30x Magnification
30x Magnification