AK> I just bought some Ferric Oxalate from a major chemical
AK> house. The problem is that I can't get it to dissolve (a
AK> 24% solution). Half of it has dissolved into the familiar
AK> green solution and half is just a lump of yellow semi-solid!
you have probably had some ferrous oxalate! (Fe II)
very stable but unuseful for platinum or kallitype print
regards,
Philippe Moroux.