Cyanotype / Na2S - NiSO4 toning
REF #52
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Operating procedure
1. Make a basic cyanotype (6 min), with 30+30s rinsing, do not dry.
2. Na2S bath for 10s (by floating upside down, otherwise too much dirt).
3. Rinse for 30 seconds.
4. NiSO4 bath for 2 min.
5. Rinse for 20 seconds.
2. Na2S bath for 10s (by floating upside down, otherwise too much dirt).
3. Rinse for 30 seconds.
4. NiSO4 bath for 2 min.
5. Rinse for 20 seconds.
Consignes de sécurité
Na₂S can be very irritating to the skin and eyes.
Na₂S can transform into H₂S in humid environments, which can be highly toxic => work under a fume cupboard is mandatory.