Cyanotype / CuCl - Na2S - ZnSO4 Toning
REF #21
White
Tan / Sable
Caramel Beige
Pale Beige
Pearl White
Pale Mauve
Lavender White
Grayish Mauve
Light Beige
1
1
Operating procedure
Caution: CuCl must be dissolved in ammonia, not water.
Therefore, the safety instructions for ammonia apply.
1. Make a basic cyanotype (6 min), with 2 min rinsing, do not dry.
2. ZnSO4 bath for 2 min.
3. Wash for 30+30 s.
4. Na2S bath for 30 seconds.
5. CuCl/NH3 bath for 5 seconds.
5. Wash for 30+30+30 seconds.
As is often the case with Na₂S, there is particle dispersion.
The front is heavily stained.
Therefore, the safety instructions for ammonia apply.
1. Make a basic cyanotype (6 min), with 2 min rinsing, do not dry.
2. ZnSO4 bath for 2 min.
3. Wash for 30+30 s.
4. Na2S bath for 30 seconds.
5. CuCl/NH3 bath for 5 seconds.
5. Wash for 30+30+30 seconds.
As is often the case with Na₂S, there is particle dispersion.
The front is heavily stained.
Consignes de sécurité
Corrosive product: Handle with nitrile gloves and safety goggles.
Be careful when preparing diluted ammonia: ammonia vapours are extremely irritating.
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.