From: Darryl Baird (dbaird@umflint.edu)
Date: 12/02/02-11:09:01 PM Z
I'm a happy argyrotypists. I use Cranes papers primarily (cheap!), with
the extra sulphamic acid boost for better contrast from my negs. Negs
come from a variety of sources... Polaroid 665, Arista enlarged negs and
Tri-X Pro. I'm beginning to work with Burkholder inkjet negs on Pictorio
after the first of the year for a workshop/class in summer. I air dry or
heat with an iron to neutralize the brown color a wee bit. Paper makes a
huge difference according to the tests I did last winter.
-Darryl
Michael Healy wrote:
>Waaaaaaa! You people keep talking VDB, but I'm working w/ argyrotype. Do any
>of these concerns/problems of yours make correllaries, or is this all a
>bunch of useless melarky to an argyrotypist? Do we
>argyrotypists have to invent our own wheels and coin our own sets of
>problems? Ahem. ARE there argyrotypists out there......?
>
>Mike Healy
>
>----- Original Message -----
>From: "Liam Lawless" <liam.lawless@blueyonder.co.uk>
>To: <alt-photo-process-l@skyway.usask.ca>
>Sent: Monday, December 02, 2002 9:05 PM
>Subject: RE: toning VDB & kalli - 2 questions
>
>
>Richard,
>
>Yes, I'd say so, except to note that even a tiny bit of silver in the
>highlights - too little to register as image density - may cause some
>discoloration on toning. You therefore want to make your test prints from
>negs with very dense highlights - a Stouffer would be ideal, or mask part of
>the image with, e.g., a coin. Polysulphide tones without prior bleaching,
>doesn't it? If the toner has no effect on the "darks" of the image, then
>it's a fair bet that hypo has it changed to suphide, but I'd guess that the
>silver particles in VDB/kalli are so fine that the toner will bleach them to
>a large extent... perhaps even if they're largely sulphide already. (I used
>to find that I could bleach sepia toned images on warm tone papers with
>iodine, whereas it wouldn't touch sepia on bromide papers.)
>
>Another point to note is that if your prints are on buffered paper, they
>will probably have formed a small amount of (insoluble) silver carbonate in
>contact with the sensitiser (which I think - but am not absolutely
>positive - contains an excess of silver nitrate). If so, this might confuse
>the results.
>
>Yet another possible complication comes from the chlorides usually present
>in tap water, responsible for the milkiness seen in the first wash. If the
>first rinse is under the tap, insoluble silver chloride will form with the
>unused sensitiser, and chances are that a little will be retained in the
>paper. Rinse for half a minute in each of two changes of pure water to
>avoid this. Afterwards, continue washing under the tap if you feel more
>washing is necessary.
>
>But the bottom line is does the image stain in toner when it hasn't been
>fixed? If it does, the exact reason isn't too important - we know we have
>to fix. Probably best to do your tests on buffered paper since most papers
>are buffered now, and we may not always know if what we're using is or not.
>
>Do let us know what happens...
>
>
>
>Liam
>
>-----Original Message-----
>From: rurmonas@senet.com.au [mailto:rurmonas@senet.com.au]
>Sent: 03 December 2002 13:21
>To: alt-photo-process-l@sask.usask.ca
>Subject: RE: toning VDB & kalli - 2 questions
>
>
>Quoting Liam Lawless <liam.lawless@blueyonder.co.uk>:
>
>
>
>>To test whether any sensitive stuff is present, put a spot of
>>sepia toner solution in a highlight area. Don't think I've ever tried it,
>>but I'd bet a millionth of a dollar that the fix is needed.
>>
>>
>
>I can't remember where I had come across the silver sulphide theory, but
>have not had any luck finding a chemical proof one way or the other. So I
>guess I had better do some tests.
>
>What I propose is to make 3 VDB prints, with exposure as equal as I can.
>Then:
>
>Take one of the prints in an unfixed, but washed condition and put it in a
>polysulphide toner. This should stain in the highlights / borders if any
>unwanted silver compounds remain on the paper.
>
>Take a second print after fixing + washing and put it in polysulphide toner.
>This will tone further if there is any unconverted silver around.
>
>The third print will be fixed and washed and is the reference print for
>comparison to 1 or 2.
>
>Do these tests seem resonable?
>
>Richard
>---
>Richard Urmonas
>rurmonas@senet.com.au
>
>
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