potassium ferricyanide

American  

noun

Chemistry.

1. a bright-red, crystalline, water-soluble, poisonous solid, K 3 Fe(CN) 6 , used chiefly in the manufacture of pigments, as Prussian blue, and of paper, especially blueprint paper.

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potassium ferricyanide

Cyanotype is a photographic medium that uses ferric ammonium citrate, potassium ferricyanide, and simple sunlight to make an image.

From Scientific American ● Dec. 23, 2011

If the film is then plunged into solution of potassium ferricyanide it becomes red or blue, while the lines traced show by their different reaction that they consist of ordinary silver.

From Scientific American Supplement, No. 832, December 12, 1891 by Various

They combine readily with the alkyl iodides to form alkyl acridinium iodides, which are readily transformed by the action of alkaline potassium ferricyanide to N-alkyl acridones.

From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg

In most cases a blue coloration will appear; the addition of 1-2 drops of potassium ferricyanide solution with formation of a blue coloration indicates the presence of Neradol ND without fail.

From Synthetic Tannins by Grasser, Georg

Expose until the image is visible, then develop by floating on a solution of potassium ferricyanide at 5 per 100 of water—the image appears at once with a rich brown color.

From Photographic Reproduction Processes by Duchochois, Peter C.