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Process | Freestone Print Company
Monday , 19 March 2018


Toning Formulas for Cyanotype

Toning involves two basic steps: bleaching and toning. Every toner for this process contains some form of tannin, because cyanotype base formulas use iron instead of silver gelatin, like black-and-white photography. Tannin chemically binds to iron in the coated emulsion, changing the print’s color. Why Tone Your Prints? There will be times when you simply don’t want a blue image but still wish to use ... Read More »

The Cyanotype Process Step-by-Step

At a Glance: Unlike photographs set in silver, like in black and white photography, cyanotypes use a solution of iron compounds. This process invented by Sir John Herschel has changed little since his discovery was unveiled in 1842. The beauty of cyanotype is its versatility: There’s a limitless number of materials an artist can use to make a personalized cyanotype. ... Read More »

Base Formulas for Cyanotype

The chemicals needed for cyanotypes are inexpensive. They are relatively safe to handle and keep well both dry and in solution. Ferric ammonium citrate: Two powdered forms: 1.) brown-red and 2.) green. The green powder is more light sensitive and produces a longer tonal range. Potassium ferricyanide: Exercise care. There is a similar compound, potassium ferrocyanide, that will not work ... Read More »