Alternative Process

Images

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  Bromoil

  The Bromoil process was invented in 1907. A typical silver gelatin print is created with the difference that it is normally exposed twice as long and one grade less than normal. Not all papers work with the Bromoil process. After drying overnight, the paper is bleached and tanned - the tanning process hardens the emulsion relative to the amount of exposure received. After drying again overnight, the paper is soaked and then stiff ink is applied to the paper with a brush. The areas that received less light during exposure were hardened less during the tanning process, thus the swelling of the gelatin rejects the ink to a greater degree than the areas which received more exposure.
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  Cyanotype

  The Cyanotype process was discovered by Sir John Herschel in 1842. Two chemicals: Ammonium iron citrate and Potassium ferricyanide are dissolved in water and applied to paper. The paper becomes light sensitive, and after drying can be contact printed from a large format negative. The paper is developed in water, where the iron salts are washed away and the ferric ferrocyanide remains as a blue color.
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  Expired Paper Photograms

  These images are basic photograms, where items are placed on expired photographic paper, and the paper is then exposed. However, instead of exposing the paper under an enlarger and developing it with the standard chemicals, the paper is exposed to sunlight until it changes color. Fixing the paper will cause it to lose its color, so the results are scanned. Curves and levels are digitally altered to bring out the contrast and enhance the coloration.
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  Van Dyke

  The Van Dyke process requires that paper be coated with a sensitizer, then contact printed under ultraviolet light. There are numerous formulas that can be employed, but the common element to all is silver nitrate. After exposure the paper is washed and fixed, which not only makes the paper no longer light sensitive, but also enhances the brown color.

Articles

• Alternative Photographic Process FAQ
• My Method for Casein Bichromate by Ernest J. Theisen
• Dye Transfer Materials and Processes by James Browning
• Kallitypes by Philippe Moroux
• Gravure by Peter Miller
• The New Cyanotype Process by Mike Ware
• Ziatype, A Bostick & Sullivan Research Product
• 21 Easy Steps To Albumen Printing by Mike Robinson
• Albumen Photographs: History, Science and Preservation

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