CYANOTYPE ON GLASS
Although the origin of this process is unknown, a few old publications mentioned that it was traditionally done by coating a plate with gelatin, then emerging the plate in a solution of cyanotype, to absorb the light sensitive chemicals. A few modern photographers had created gelatin based cyanotypes on glass starting in the mid 90s. Although some photographic evidence exists of their work, their process for creating these images was not made public.
January 29th 2013, Modern Alternative Process Photographer Joseph J. McAllister created a new all-in-one emulsion based on Dr. Richard L. Maddox Dry Plate Gelatin Process of 1871, and monochromatic celluloid film invented by John Carbutt, Hannibal Goodwin, and George Eastman of Eastman Kodak, which was commercially available in 1889. Instead of Silver Halides, this process uses a non-silver emulsion made with Green Ferric Ammonium Citrate, Potassium Ferricyanide, Oxalic Acid, Gelatin & Distilled Water. McAllister coined the names “Dry Plate Cyanotype,” “Cyanotype Emulsion,” and “Glass Cyanotypes,” to describe his new process.
McAllister’s process uses Dick Sullivan’s Cyanotype Formula without the “optional” Ammonium Dichromate (used for speed, shelf life, and to stop blue formation), an easy all-in-one approach, and readily available Knox® Unflavored Powdered Food Grade Gelatin with a 225 Bloom Strength. Food grade gelatin (or gelatine) is also known as E441, PerfectaGel Silver, Type A (food grade). It is made of animal bones & collagen, the most common source being pig skin.
Joseph J. McAllister
My/AP Workshop Ep1 - Cyanotypes & Digital Negatives
My/AP Workshop Ep2 - Cyanotype on Glass
My/AP Workshop Ep3 - Red Chameleotypes
My/AP Workshop Ep4 - Magnesium Flash Photography
My/AP Workshop Ep5 - How To Use A View Camera
How to Print Cyanotype on Glass [PDF]
How to Print Van Dyke on Glass [PDF]
How to Make Ground Glass View Plates [PDF]
Bellows Replacement 101 [PDF]
Electrolytic Etching of Brass [PDF]
Camera & Lens Basics - Technical Info [PDF]
Nikon 64 Bit Patch [PDF]
Upgrades firmware for Nikon cameras to from 24 to 64 bit video.