Quote Originally Posted by sanking
A couple of months ago I mixed a rather large amount of ferric oxalate solution for kallitype and palladium printing, anticipating that I would use all of it within a relatively short period of time. Well, things happened and I was delayed in making the planned kallitype and palladium prints, and now I am going to be doing carbon printing only until July. Question is, can I keep the ferric oxalate solution (25%) fresh by freezing? Any literature on this?

Sandy, I have not seen anything about freezing it. It can be placed in cold storage to extend the ageing process, to slow the conversion down, but I have not seen if freezing will work. How about just the coldest part of the refrigerator? I'd add a little oxalic acid to it before I chilled it. It is relatively easy to make, I'd not worry too much about it but it would be fun to see. I have enough right now that I could throw it in the freezer just to see what happens.