Schlüsselloch

The atofacts by Constanze Zacharias consist of various small cyanotypes. One of the keyholes from the series will be sent to you. If you like a particular atofact, please send us an e-mail to: [email protected].

Cyanotype is a light printing process. It involves photosensitizing paper with a solution of ammonium iron(III) citrate and potassium hexacyanidoferrate(III). This photographic process is also known as iron blue printing.