RE: Dissolving Ferric Oxalate Kallitype

Michael, Oxalic Acid will set up the ferric powder to go into solution. I
believe that 2g is a very safe place to start. Jeffrey has posted on this,
and I think that you'll find that a little excess oxalic acid will help your
ferric last longer; not convert to ferrous.

Are you concerned about excessive oxalate running around in your ferric? Or
the pH level and its effect on image color?

Eric Neilsen Photography

4101 Commerce Street, Suite 9

Dallas, TX 75226

214-827-8301

http://ericneilsenphotography.com

  _____

From: Loris Medici [mailto:mail@loris.medici.name]
Sent: Saturday, January 21, 2006 3:48 PM
To: alt-photo-process-l@sask.usask.ca
Subject: RE: Dissolving Ferric Oxalate Kallitype

One more point: I presume you used distilled water for making the solution;
maybe your distilled water and/or the bottle was contaminated somehow (I
always rinse my bottles with copious amnt. of distilled water before
using/reusing them). Try to add some drops of silver nitrate soln. to some
drops of your distilled water and see if it precipitates or forms a cloudy
soln. (Well, even if it stays clear it may not show the water is fine - I
don't have that much chemistry knowledge to suggest a better test... But if
it gets cloudy, then you'll definitely know that there's a problem with your
water!?).

Regards,

Loris.

  _____

From: Michael Koch-Schulte [mailto:mkochsch@shaw.ca]
Sent: 21 Ocak 2006 Cumartesi 21:24
To: alt-photo-process-l@sask.usask.ca
Subject: 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 <mailto:e.neilsen@worldnet.att.net> 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

  _____

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 <mailto:mail@loris.medici.name> 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.

  _____

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 17:48:56 2006