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Blue Toner


erik_asgeirsson

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Ferricyanide-iron toner for blue tones

 

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STOCK FERRICYANIDE SOLUTION

Potassium ferricyanide 2 gr

Sulphuric acid, con. 4 cc

Water to make 1000 cc

dissolv the potassium ferrricyanide in the water and the add the acid

slowly

 

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STOCK IRON SOLUTION

Ferric ammonium citrate 2 g

Sulphuric acid,con 4 cc

Water to make 1000 cc

 

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Dissolve the ferric ammonium citrate in the water and the add the acid

slowly. For use , mix equal parts of the two solutions just before use.

The prints should be a bit lighter than usually.

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