Ferric ammonium oxalate, 25% solution

Description

A ready solution of the light-sensitive salt for «new cyanotype» and platinum-palladium printing. A reagent for working to your own formulas.

Where it is used

Ferric oxalate underpins not only oxalate cyanotype but platinum-palladium printing: it is what reduces the noble metal under ultraviolet light. A ready solution saves weighing a salt that is extremely hygroscopic.

Questions and answers

Any precautions?

Oxalates are toxic. Wear gloves, avoid skin contact and do not pour residues into household drains.