Cyanotype / Lightening with ammonia

REF #10

Potassium Ferricyanid K3[Fe(CN)6] sol. 8%

Ferric Ammonium Citrate [NH4]{y}[Fe{x}(C6H4O7)] sol. 20%

Ammonia solution NH3·H2O sol. 0.16%

1. Make a basic cyanotype (5 mins), do not dry
2. Rince 2 times 1 minute
3. Dip in diluted ammonia for 3 seconds
4. Wash for 10+10 seconds

Corrosive product: Handle with nitrile gloves and safety goggles.

Be careful when preparing diluted ammonia: ammonia vapours are extremely irritating.