Re: potassium vs. ammonium citrate pd developer

Chris,
Are you using your citrate as a one shot or replenished developer?
Marek

>From: "Christina Z. Anderson" <zphoto@montana.net>
>Reply-To: alt-photo-process-l@usask.ca
>To: "Alt, List" <alt-photo-process-L@usask.ca>
>Subject: Re: potassium vs. ammonium citrate pd developer
>Date: Mon, 10 Apr 2006 09:08:01 -0600
>
>Thanks, Loris,
>
>I should thank Philippe, too--I filed this bit of knowledge in my alt note
>file.
>
>Well, since I was in a bind I mixed up the potassium citrate and used it,
>but I did not mix it with the remaining ammonium citrate for fear of some
>reaction between potassium and ammonium. One is acid, one alkaline, no?
>
>SO, at least I can safely report to the list that potassium citrate and
>ammonium citrate seem to be both the same speed and color and, by my eye,
>interchangeable (phew). And then I had to race into town and bum some
>ferric oxalate off of a student, so I can at least print multiple copies of
>the negatives I have if I can't print more negatives because of no printer
>ink for the 2400 in town...
>
>I also have some sodium citrate. I bought all three citrates a long while
>back when I was first writing my alt process condensed book, to test them
>all side by side. Nothing like necessity to force me into finally doing
>it!
>Chris
>----- Original Message ----- From: "Loris Medici" <mail@loris.medici.name>
>To: <alt-photo-process-l@usask.ca>
>Sent: Monday, April 10, 2006 4:59 AM
>Subject: RE: potassium vs. ammonium citrate pd developer
>
>
>>I've just found that making ammonium citrate was already discussed in
>>the list.
>>
>>See:
>>/lists/alt-photo-process/2003/feb03/0452.htm
>>
>>
>>-----Original Message-----
>>From: Loris Medici [mailto:mail@loris.medici.name]
>>Sent: 10 Nisan 2006 Pazartesi 13:38
>>To: alt-photo-process-l@usask.ca
>>Subject: RE: potassium vs. ammonium citrate pd developer
>>
>>
>>
>>Terry, don't panic... I know very well that mixing ammonia and citric
>>acid will form ammonium citrate (I mixed potassium oxalate and sodium
>>citrate before, therefore I'm not that much uninformed about
>>neutralization reactions). What I don't know is:
>>
>>1) the exact proportions of the chemicals in order to end up with a
>>neutral salt solution
>>2) if the reaction cause too much effervescence and/or heat and/or
>>something else that may cause harm
>>
>>That's why I specifically added the comment "...I neither know the
>>proportions you should use, nor know if that's a dangerous reaction! I'm
>>just mentioning this for letting a chemist chime in and clarify this
>>issue..." marked in red and suggested that a "chemist" should intervene
>>(I repeat: a chemist). Please do not warp what I said or act like we are
>>totally ignorant about chemicals - this is highly disrespectful.
>>
>>
>>-----Original Message-----
>>From: TERRYAKING@aol.com [mailto:TERRYAKING@aol.com]
>>Sent: 10 Nisan 2006 Pazartesi 13:11
>>To: alt-photo-process-l@usask.ca
>>Subject: Re: potassium vs. ammonium citrate pd developer
>>
>>
>>
>>Both Chris and Loris
>>
>>Whatever you do do not treat chemistry like that !
>>
>>It's a very good way to an early grave and to taking a bus load of
>>friends, relations and students with you. Seemingly innocuous things
>>mixed together can prove toxic or explosive. Make sure that you know
>>what you are doing first !
>>
>>I have had experience of using potassium citrate, the old fashioned cure
>>for cystitis, for developing platinum prints, I found that it was more
>>trouble than it was worth. After a time one begins to realise why people
>>have been using potassium oxalate for such a long time..
>>
>>PLEASE, PLEASE, TREAT CHEMICALS WITH RESPECT.
>>
>>
>>Terry
>>
>>
>
>
Received on Mon Apr 10 09:52:20 2006