Copper Toner

Dassonville T-5 Copper Toner

For purple-brown to chalk red tones.

Solution A

Copper (Cupric) Sulfate......................... 6.5 g
Potassium Citrate................................ 25 g
Water to make.................................. 1000 ml

Solution B

Potassium Ferricyanide.......................... 5.5 g
Potassium Citrate................................ 25 g
Water to make.................................. 1000 ml

Mix equal parts of A + B for use.

Thoroughly washed prints are immersed until the colour reaches the desired tone. Colour of tone changes over time in toner bath.
Prints must be thoroughly washed following toning. 800ml of working toner solution will tone approximately three 10×12 inch prints consistently.

Full instructions are given in The Darkroom Cookbook.

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