Cyanotype / Lightening with photographic bleach

REF #29

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

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

Bleach (color photography) K3[Fe(CN)6] + BrK

1. Make a basic cyanotype (5 mins), do not dry
2. Dip in photographic bleach for 30 seconds
3. Wash three times for 30 seconds each time