Re: Dissolving Ferric Oxalate Kallitype

Thanks Eric. Good point. I'll drop Claire a note and see I'm just seeing a neutral sediment or if it really takes that long. No, I did not add any Oxalic Acid, why, what would that do? I noticed the Pt/Pd formulas call for it but I didn't see that mentioned for Kallitype.

~m

  ----- Original Message -----
  From: Eric Neilsen
  To: alt-photo-process-l@sask.usask.ca
  Sent: Saturday, January 21, 2006 11:09 AM
  Subject: RE: Dissolving Ferric Oxalate Kallitype

  It may be normal for their FO. Did you ask them? (JPPhotochem)

  Did you add any Oxalaic Acid to the powder before mixing?

  Eric Neilsen Photography

  4101 Commerce Street

  Suite 9

  Dallas, TX 75226

  http://e.neilsen.home.att.net

  http://ericneilsenphotography.com

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  From: Michael Koch-Schulte [mailto:mkochsch@shaw.ca]
  Sent: Saturday, January 21, 2006 10:18 AM
  To: alt-photo-process-l@sask.usask.ca
  Subject: Re: Dissolving Ferric Oxalate Kallitype

  I'm in day two of trying to get ferric oxalate to go into solution. I've made a batch of 50 mls. I've tried microwaving for 20-30 seconds (warm as a cup of coffee, 50 C maybe) and then shaking the bottle for five minutes. I get a milky solution. After about 10 minutes it separates out and I get a nearly clear liquid on top and a chalky sediment on the bottom. I've repeated this at least 15 times in two days. The sediment just isn't budging yet. Is this normal?!

  ~m

    ----- Original Message -----

    From: Loris Medici

    To: alt-photo-process-l@sask.usask.ca

    Sent: Saturday, January 21, 2006 6:07 AM

    Subject: 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.

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    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 13:24:07 2006