PQ Stain

Jorge Oliveira
Al Carlos carvalho 928/8
80430-180 Curitiba PR
Brazil

Jorge


Patrick Gainer wrote in
:


I'm back in good health. It was some kind of intestinal bug. I used to
call it "24 hour crud" but everything is slower now, so it's more like
48 hours.

I believe I promised to send some negs and prints to demonstrate some
of the things I have learned lately. First one to supply a snail mail
address gets it. That person can pass the package on down the list if
there are more than one.

Pat

Dennis O'Connor wrote:

Dr. Dennis O'Connor
570 N. Hemlock Rd.
PO Box 439
Hemlock, MI 48626

"Patrick Gainer" wrote in message
...


nicholas wrote:

Hi everyone, best wishes Patrick for a speedy recovery. It must be
exhausting trying to explain that in some developers that Sulphite
actually hinders rather than helps some developers - over and over
again... ;-) Especially when it's true.
I just wanted to post a follow-up to this developer, it is indeed
amazing and I printed up a 6x6cm neg (Apx100) to 10x10 in it. No grain
through my magnifier (Micromega Critical Focusser) and amazingly
beautiful tones - on the paper that is. I have a new favorite developer.
Thanks again Pat for introducing me to a (relatively) non toxic staining
developer. Works wonderful. One caveat however, I will probably alter
the dilution to at least 1:75 (most likely 1:100) because the time is
too short with my normal metaborate-like alkaline component (around
5mins). Cheers
Nicholas,

I'm back in good health. It was some kind of intestinal bug. I used to
call it "24 hour crud" but everything is slower now, so it's more like
48 hours.

I believe I promised to send some negs and prints to demonstrate some of
the things I have learned lately. First one to supply a snail mail
address gets it. That person can pass the package on down the list if
there are more than one.

Pat
You're on, Denny me boy. Tomorrow I will take to the post office a
package containing 3 prints, 3 negative strips for the prints, and 3
negative strips of step density wedge developed together with
corresponding picture negatives. Film is 400TX. The developer is the
PC-Glycol concebtrate diluted 1+50 with a) 5 g pHPlus and 5 g borax per
liter; b) the same with 20 g of sulfite added per liter; and c) 100
grams of sulfite + 2 grams of Kodalk (the real stuff) per liter. You may
be surprised at what you see.

Pat

Jorge Omar wrote

Undoubtly sulfite has a very pronounced effect on PA devs.
If one develops without any sulfite for the same
film/time/temp/concentration, using borax as accelerator (12g/liter
working), negatives will be thin to the point of been unprintable.
Add sulfite to 25g/liter working, and all is swell...

That reaction to the sulfite addition is due to the increase in ph.
If I recall correctly 1% solutions of borax and sulfite measure
9, and 10.6. Sulfite will up the ph way above borax.
Crawley via P. Dignan states, ... sulfite removes surface flare and
image spread. He is speaking of FX-13. R. Suzuki adds sulfite to FX-1,
IIRC, to improve the gradiation.
I'm about to brew up some FX-1 and should investigate the matter. Dan

No, sulfite does not rises pH of a borax solution, actually it lowers a
little bit.
I've mixed a borax 12g/l solution, measured pH and then
added sulfite at 25g/l. pH went down by 0.2 pH (at lest using my meter).

It has to do with exposing dev centers or alike.

Jorge

(Dan Quinn) wrote in
om:

Jorge Omar wrote

Undoubtly sulfite has a very pronounced effect on PA devs.
If one develops without any sulfite for the same
film/time/temp/concentration, using borax as accelerator (12g/liter
working), negatives will be thin to the point of been unprintable.
Add sulfite to 25g/liter working, and all is swell...

That reaction to the sulfite addition is due to the increase in ph.
If I recall correctly 1% solutions of borax and sulfite measure
9, and 10.6. Sulfite will up the ph way above borax.
Crawley via P. Dignan states, ... sulfite removes surface flare and
image spread. He is speaking of FX-13. R. Suzuki adds sulfite to FX-1,
IIRC, to improve the gradiation.
I'm about to brew up some FX-1 and should investigate the matter.
Dan

Jorge Omar wrote

No, sulfite does not rises pH of a borax solution, actually it lowers
a little bit. I've mixed a borax 12g/l solution, measured pH and then
added sulfite at 25g/l. pH went down by 0.2 pH (at lest using my meter).

It has to do with exposing dev centers or alike.

I've not combined borax and sulfite and then measured the ph. I will
duplicate the above conditions and post the results. Dan

Jorge Omar wrote:

Undoubtly sulfite has a very pronounced effect on PA devs.
If one develops without any sulfite for the same
film/time/temp/concentration, using borax as accelerator (12g/liter
working), negatives will be thin to the point of been unprintable.
Add sulfite to 25g/liter working, and all is swell...

Dan wrote:

That reaction to the sulfite addition is due to the increase in ph.
If I recall correctly 1% solutions of borax and sulfite measure
9, and 10.6. Sulfite will up the ph way above borax.
Crawley via P. Dignan states, ... sulfite removes surface flare and
image spread. He is speaking of FX-13. R. Suzuki adds sulfite to FX-1,
IIRC, to improve the gradiation.
I'm about to brew up some FX-1 and should investigate the matter.
Dan