RE: pH question

[EJN Photo <ejnphoto@sbcglobal.net>]

Well that might explain why I don't recall anything about it, but that will
stop the search. : ) 

Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas, TX 75226
214-827-8301
http://ericneilsenphotography.com
 
Skype : ejprinter

> -----Original Message-----
> From: Sandy King [mailto:sanking@clemson.edu]
> Sent: Tuesday, March 20, 2007 2:32 PM
> To: alt-photo-process-l@usask.ca
> Subject: RE: pH question
> 
> If the subject is kallitype you won't find anything in Dick
> Steven'
> book about sodium citrate as a developer. He did his research
> quite a
> long time ago when the most popular kallitype developers were
> the
> Rochelle salts, Borax and sodium acetate. It was much later
> that
> people begin using for kallitype some of the same developers
> that
> work so well for pt./pd. printing, such as ammonium and sodium
> citrate and even potassium oxalate.
> 
> Sandy King
> 
> 
> At 1:41 PM -0500 3/20/07, EJN Photo wrote:
> >Bob, I'd go with Don on this. Nadeau recommends that it be
> kept acid; below
> >7. He doesn't give a low end. I don't seem to be able to lay
> my hand on
> >Stevens Kallitype book right now, but If I do, I let you know.
> One way to do
> >it without a reference would be to check it now and again, and
> track the
> >changes. When it is at or close to 7 add citric acid to reduce
> it to 6. Make
> >a print and see how it looks, then make an additional drop in
> pH perhaps to
> >5.5 and see what happens with an additional test print/wedge.
> I believe it
> >is just that it likes acid environment, but no need to get it
> too low.
> >
> >Eric Neilsen Photography
> >4101 Commerce Street, Suite 9
> >Dallas, TX 75226
> >214-827-8301
> >http://ericneilsenphotography.com
> >
> >Skype : ejprinter> -----Original Message-----
> >>  From: BOB KISS [mailto:bobkiss@caribsurf.com]
> >>  Sent: Tuesday, March 20, 2007 12:06 PM
> >>  To: alt-photo-process-l@usask.ca
> >>  Subject: RE: pH question
> >>
> >>  Anyone???
> >>	CHEERS!
> >>		BOB
> >>
> >>  -----Original Message-----
> >>  From: BOB KISS [mailto:bobkiss@caribsurf.com]
> >>  Sent: Tuesday, March 20, 2007 9:17 AM
> >>  To: alt-photo-process-l@usask.ca
> >>  Subject: pH question
> >>
> >>  DEAR LIST,
> >>	At what pH should I keep my Potassium Citrate developer for
> >>  pt/pd?
> >>	Eric Neilson suggested that I keep my Pot Ox dev at between
> >>  5 and
> >>  5.5 with small additions of oxalic acid when necessary.  I
> can
> >>  add small
> >>  amounts of citric acid to my Pot Cit dev but I am hoping to
> >>  know what the
> >>  best aim pH is for best development.
> >>	Thanks in advance...
> >>		CHEERS!
> >>			BOB
> >>
> >>   Please check my website: http://www.bobkiss.com/
> >>
> >>  "Live as if you are going to die tomorrow.  Learn as if you
> are
> >>  going to
> >>  live forever".  Mahatma Gandhi
> >>
> >>
> >>