Cyanotype / SnCl2 development

REF #86

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

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

Stannous chloride SnCl2 sol. 0.1%

1. Make a basic cyanotype (6 mins), but do not wash with water.
2. SnCl2 bath for 30 seconds.
3. Wash three times for 30 seconds each time.