Cyanotype recipe (3)
Modified Basic Solution
A more sensitive and stable recipe that lasts 4-6 months.
This is the one I use.
| Solution A | Solution B |
| 1.25 g Oxalic Acid | 1.25 g Oxalic Acid |
| 67.5 g Ferric Ammonium Citrate | 22.5 g Potassium Ferricyanide |
| 250 ml distilled H20 | 0.5 g Ammonium Dichromate |
| 250 ml distilled H20 |
Mix equal portions of A and B just before use.