RE: Dissolving Ferric Oxalate Kallitype

Maybe you can put the bottle in warm (40 - 50C?) water and shake the warm
solution. It may help to dissolve the remaining FO. I mixed FO only once
(but hadn't the opportunity to use it - I dumped it a year later, without
testing... because I've read that it goes bad in 3 months). Mine was
dissolved completely after two days just with the initial shaking/stirring -
I didn't visited the solution once I mixed it. Two days later there wasn't
any precipitate in the bottle. My FO was from B&S.
 
Regards,
Loris.

  _____

From: Michael Koch-Schulte [mailto:mkochsch@shaw.ca]
Sent: 21 Ocak 2006 Cumartesi 02:40
To: Alt-Photo-Process-L
Subject: Dissolving Ferric Oxalate Kallitype

It's been over 24 hours since I mix my first batch of Ferric Oxalate (20%).
I still have about a quarter to half an inch of "sludge" at the bottom of a
100 ml bottle. I've been intermittently shaking the bottle when I get the
chance. Should just "stay the course" or is intervention required? Also, how
pronouned is the white precipitate when doing the test for presence of Free
Oxalic Acid. I'm not sure if I'm seeing just a milkly scum from the
undissolved Ferric Oxalate or precipitate. Ferrix Oxalate was obtained from
jdphotochem. Thx.
 
~m
 
 
Received on Sat Jan 21 06:08:15 2006