Cyanotype

Cyanotype photography refers to the process of printing a picture by using sunlight and a series of chemicals. The chemicals involved in cyanotype photography include Prussian blue, aqueous potassium ferricyanide and aqueous ferric ammonium citrate. When producing a cyanotype picture, the paper (or other printing medium) is treated with each of the chemicals.

The image is then placed upon treated paper, weighed down with glass and taken out into the sun. The combination of sunlight and chemicals will then imprint the image onto the paper in a dark blue or gray color. Keep the paper in the sun for five to fifteen minutes, or until the paper is visible bluish-grey.

When the paper has turned, remove the glass and rinse the chemicals off the paper. After the paper is dry, the print is complete.

Objects used in cyanotype photography should be flat and opaque. When using the cyanotype method, remember that the prints turn out best with greater contrast. Also, wear gloves, as the chemicals stain.

Cyanotype is not only cost effective, but it also serves as an effective alternative to a darkroom. In fact, the most expensive aspect of this method is the cost of paper. Those beginning to dabble in photography should begin experimenting with cyanotype to learn the mechanics of printing photographs.