Potassium Ferricyanide

What is Potassium Ferricyanide, AKA Pot Ferri?
It is a chemical compound K3(FE(CN)6) with an amazing red colour with the possibility of some green-yellow fluorescence.

What applications is Potassium Ferricyanide used in?
This chemical has many uses across a variety of industries.

Photography Applications
When combined with Hypo the end result is known as Farmer's Reducer. Used in old school Black & White printing
Toning photographic prints (rust reds to cooper shades).

Oxidation Reagent
Prussian Blue, Prussian Red
Murakami's etchant
Dyeing Wool
Electroplating