In a laboratory setting, the catalyst used is often potassium ferricyanide.

These can be bleached by applying a potassium ferricyanide solution to them.

Iron and copper toning involve the use of potassium ferricyanide.

In most amateur darkrooms, a popular bleach is potassium ferricyanide.

Potassium Ferricyanide is deep red and I just saw a web-site recomending it.

Ferroxyl indicator is a solution containing potassium ferricyanide and phenolphthalein.

The best known is probably a process using ammonium ferric citrate and potassium ferricyanide.

Potassium ferricyanide has very low toxicity, its main hazard being that it is a mild irritant to the eyes and skin.

Excess ammonium ferric citrate and potassium ferricyanide are then washed away.

Potassium ferricyanide.

Potassium ferricyanide is manufactured by passing chlorine through a solution of potassium ferrocyanide.

Potassium ferricyanide separates from the solution:

Cobalt chloride, developed by potassium ferricyanide.

Metcalfe took out a miniature vial of crystalline potassium ferricyanide, one of the items he usually carried on his person while in the field.

Potassium ferricyanide is used as an oxidizing agent to remove silver from negatives and positives, a process called dot etching.

Aurotype is a monochrome photographic printing process that uses Gold chloride, potassium ferricyanide and ferrocyanide.

This compound may be synthesized by the oxidative coupling of morphine by potassium ferricyanide.

Upon treatment with chlorine gas, potassium ferrocyanide converts to potassium ferricyanide:

Potassium ferrocyanide, potassium ferricyanide, and Prussian blue account for over 97% of cyanides in the environment.

The same product can be obtained by using other oxidizing agents such as potassium ferricyanide and concentrated caustic potash solution.

The red substance, trumpeted by newspapers as a cyanide compound, was potassium ferricyanide, a readily available substance used in photography.

The most common salt of this anion is potassium ferricyanide, a red crystalline material that is used as an oxidant in organic chemistry.

First the print is soaked in a potassium ferricyanide bleach to re-convert the metallic silver to silver halide.

The potassium ferricyanide component is very sensitive, and will detect iron in calcite with 1% ferrous carbonate in solid solution.

Potassium ferricyanide is usually used as an oxidizing chemical in such experiments (E 436 mV at pH 7).