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Cyanotype / CuSO4 development

Cyanotype / CuSO4 development

REF #83
Coffee Brown Dark Cocoa Brown Pale pink Pale Lavender Dark Taupe Dark Mauve Dark teal
Potassium Ferricyanid K3[Fe(CN)6] sol. 8%
1
Ferric Ammonium Citrate [NH4]{y}[Fe{x}(C6H4O7)] sol. 20%
1
Copper sulfate CuSO4 sol. 2%
365nm

Operating procedure

1. Make a basic cyanotype (5 mins), but do not wash with water.
2. CuSO₄ bath for 30 seconds.
3. Wash three times for 30 seconds each time.