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Cyanotype / DMDTC - NiSO4 Toning

Cyanotype / DMDTC - NiSO4 Toning

REF #81
White Tan / Sable Pinkish beige Coffee Brown Pearl White Dark Taupe Off-White
Potassium Ferricyanid K3[Fe(CN)6] sol. 8%
1
Ferric Ammonium Citrate [NH4]{y}[Fe{x}(C6H4O7)] sol. 20%
1
Nickel sulfate NiSO4(H2O)6 sol. 2%
365nm

Operating procedure

1. Make a basic cyanotype (6 min), with 30+30s rinsing, do not dry
2. DMDTC bath for 40s
3. Rinse 30+30+30 seconds
4. NiSO4 bath for 1 min
5. Rinse 30+30+30 seconds

The result is really beautiful, with a deep brown-black colour.