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Cyanotype / DMDTC toning

REF #95

White Pale Mauve Grayish Mauve Taupe Light Taupe Chocolate Brown Burnt Umber

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

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

Sodium Dimethyl Dithiocarbamate (DMDTC) C3H6NNaS2 sol. 2%

Copper sulfate CuSO4 sol. 2%

365nm

Operating procedure

1. Make a basic cyanotype (5 mins), with 30+30 secs rinsing, do not dry.
2. DMDTC bath for 40 secs.
3. Rinse for 30+30+30 secs.

The magic of DMDTC: a sepia/umber tone without colouring the paper.
Reminder: salted paper.