RE: A question of chemistry?

The ratio that I gave you completely uses up the components and if you are
keeping you potassium oxalate acid ( as you should) a slight increase in
oxalic acid is a good thing, but your 130 to 125 seemed a bit high to me.
The mixture of 330g /1 liter provides a sp gr around 1.065 if memory serves
me well, but I'd check that before I used it. I can't seem to lay my
fingers on the data that I had in my notes. Too many years to notes with
too many computer crashes, files, etc. Maybe someone out there has it.

Eric Neilsen Photography

4101 Commerce Street, Suite 9

Dallas, TX 75226

214-827-8301

http://ericneilsenphotography.com

  _____

From: kismet [mailto:samba@superonline.com]
Sent: Friday, July 15, 2005 9:17 AM
To: alt-photo-process-l@sask.usask.ca
Subject: Re: A question of chemistry?

Thank you Eric Neilsen,

You are right. I have just remade a test solution of 1 liter with
20%solution of oxalic acid and added 220g of potassium carbonate. Worked
quite fine, similar to my old original potassium oxalate solution. I
decreased a little bit the part of pot. carbonate on purpose, to be at the
acidic side.

Thanks again for your remark and help.

Best

Mehmet Kismet

 
Received on Fri Jul 15 10:29:00 2005