When Jeffrey Mathias tested various batches of ferric oxalate in the 1990s he found that the B&S ferric oxalate was about 89-91% pure, the Artcraft FO 95% pure. See http://home.att.net/%7Ejeffrey.d.mat...e/contents.htm and in Chapter 6 click on Formulas for FO Sensitizer Solutions.

This information may or may not pertain to current supplies. However, I obtain my FO from Artcraft and can state for a fact that in my work it has always been of consistently high quality.


Quote Originally Posted by Kerik
If you value your time, most definitely no, IMO. The quality of the B&S stuff is very good and it's very consistent. I've had mixed results with Artcraft's. B&S makes their's in-house, Artcraft is getting it from another supplier, I believe. I'm not knocking Artcraft, I'm a very happy customer of theirs. It's just that good, consistent FO is important if you want to make consistently good pt/pd prints. And compared to the other costs that go into making a print, the cost is negligible. For an 8x10 print that costs between $2 and $3 in materials, roughly 15 cents is in the ferric.