Oxalic Acid in Pt/Pd

Discussion in 'Alternative Processes' started by Ian Leake, Jul 17, 2009.

  1. Ian Leake

    Ian Leake Subscriber

    Mar 25, 2005
    8x10 Format
    I've been thinking about Oxalic Acid recently. In Arentz's book he suggest a Ferric Oxalate A recipe of 15g Ferric Oxalate + 1g of Oxalic Acid + 55ml water; and there's a footnote that says that adding more Oxalic Acid increases speed.

    I'm thinking about doing some experiments by varying the Oxalic Acid in the FO mix. But before I do that I thought it would be useful to ask about this here. My question is: other than a change in speed, what else does varying the amount of Oxalic Acid do? Is there a tone change, does it effect quality, or is there anything else that I should look out for?

    For reference, my developer is Potassium Oxalate + Potassium Dichromate for contrast control.

    Thanks in advance.