Hi,
I have read that Sandy King recommends a 1/4 to 1/2 strength acid stop bath after developing with PyroCAT-HD.
I want to know which acidic chemicals can be used for the purpose without compromising the staining effect given by the developer.
There are a great number of citric acid based stops available but I believe citric acid reduces or removes the stain.
Thanks for your help as always,
Steve.
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