Don, It is quite easy to make a liquid Ferric Oxalate. Dick Stevens's book on the Kallitype list three methods for making Ferric Oxalate. I have also included it in my book. The second method listed in Steven's is the way I make mine, and have been since 1994. The chemicals are not so hard to come by, but as you go up in volume, you really start to see a saving in price. I have it listed on my web site. I don't know if John meant to refer to me, or Eric Nelson ( I have not checked out Eric's site for some time). If you have l;imited lab ware, you may want to follow the other advice and just stay with B&S, but if you have any adventure in you, it takes some time as it does need to settle but it really is quite easy.
Originally Posted by donbga