What is "Prussian Blue"?

Prussian blue, or ferricyanide, is a coordination compound.

Prussian Blue is a compound of the Prussian Blue family. Prussian White contains high sodium, Prussian Blue contains only one sodium and appears white, so it is called Prussian White.

Blue is the most essential color of the universe, the artist Yves Klein said so, and photography captures the image of everything in the universe, so the blue becomes an essential color in the photographer's lens.

There is no process more unique than the process of making Prussian blue, which, if not for fate, must have required a formidable theory to invent. The French chemist, Jean Hérault, revealed the mystery of Prussian blue in a single word.

In 1704, a German chemist named Heinrich Diesbach was producing a red pigment in his laboratory when an accidental contamination yielded a dark blue precipitate.

This blue precipitate turned out to be a pigment with excellent performance, and was finally named Prussian blue.

Born in 1842, the photographic imaging process of blue solarization, the formation of blue is Prussian blue. The blue formed by this monochrome photographic printing process is calm and peaceful, deep and tense.