From: Alan Greene (hobbyhorsedada@hotmail.com)
Date: 12/11/02-05:55:44 PM Z
In my previous message concerning "potassium citrate", I inadvertently
suggested that combining citric acid with potassium carbonate would yield a
precipitate of potassium nitrate. Honestly, I don't know where this idea
came from--all I can say is that it was fairly late when I wrote the
message.
Sorry for any confusion this may have caused.
Alan Greene
>From: Michael Healy <mjhealy@kcnet.com>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Potassium Citrate
>Date: Sun, 08 Dec 2002 21:27:25 -0700
>
>Mr. Science here wants to try salt prints. But Mr. Science knows only a
>little more about chemicals than the cat. Wings and prayers are what we've
>got going for us. So the formula calls for potassium citrate. Mr. Science
>here wouldn't know potassium citrate if it knocked on his door and bit him
>in the ass. The only place we're even finding the stuff is at
>Photographer's
>Formulary, which frankly is 25-40% more expensive item by item than, e.g.,
>B&S. But B&S doesn't seel pot. citrate. In fact, nobody seems to, apart
>from
>the vitamin supplement people.
>
>So what the hell IS potassium citrate? Is this the same thing as the
>vitamin
>supplement? Are we just strolling across town to score bottles of it from
>the local health food church, and then grinding it down in the kitchen?
>
>Jan Arnow actually advances the claim that sodium citrate can be
>substituted
>(93 parts of s.c. instead, due to their different weights). But I'm not
>sure
>I trust Arnow. This wouldn't be the first time her claims have made me
>suspicious, in the light of more contemporary writers on the alternative
>processes. On this particular point, I'd rather act on the advice of
>somebody who's perhaps more knowledgable in chemistry.
>
>Can anybody hold my hand on this, and point me to safe harbor?
>
>Mike Healy
_________________________________________________________________
Protect your PC - get McAfee.com VirusScan Online
http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
This archive was generated by hypermail 2.1.5 : 01/31/03-09:31:25 AM Z CST