Ferric ammonium citrate, 40% solution

Description

A ready 40% solution of the light-sensitive salt for cyanotype and other iron processes. A reagent rather than a kit: you mix it yourself, in your own proportions.

Who it is for

Anyone working to their own formulas who wants control over the ratios rather than something pre-mixed. A ready solution removes the worst part — weighing a hygroscopic salt that sticks to everything and picks up moisture fast.

Questions and answers

How should it be stored?

Dark, cool and tightly closed. It degrades slowly in light — which is the very sensitivity you are buying it for.