Potassium Ferricyanide

Potassium Ferricyanide

$7.00 — $11.50

Potassium Ferricyanide is use in Cyanotype printing and iron and copper toning. Also used as an oxidising agent in black-and-white photography with sodium thiosulfate (hypo) to reduce the density of a negative or gelatin silver print  (known as Farmer’s reducer). Used to also solve problems from overexposure of the negative and brighten the highlights in the print.