Jacques Augustowski (jacquesa@acd.ufrj.br)
Sun, 21 Mar 1999 22:09:56 -0300 (GRNLNDST)
Hi Judy,
I don't use the Vandyke brown. The developer used is with Rochelle
salts. My experience with little silver nitrate is a solarized image.
Using less coating solution also gives a solarized image. The difference
between a 10% and a 30% silver nitrate solution in Dmax is negligible.
I haven't tried a higher concentration. Tuesday I will try with a 50%
concentration. It "solarized" in the developer and reversed in the fixer.
Thats why I can't call it a solarization but an image reversal in the
developer. I still think the drying methods/sizing does have an influence
in this reversal, although I have made no tests. As for the acetate
developer I prefer the tonality of the Rochelle salts, but will try it to
see if the reversal occurs.
Jacques
On Sat, 20 Mar 1999, Judy Seigel wrote:
>
>
> On Sat, 20 Mar 1999, Kevin O'Brien wrote:
>
> > Mine was the simple coating formulation:
> > Ferric amonmium citrate 90g
> > Tartaric acid 15g
> > Silver nitrate 25g
> > Distilled water to 1200ml
>
> Jacques, are you "developing" this formula in a "developer" other than
> water? Because that's the formula we know as Vandyke brown, which we
> "develop" in plain water, and then fix and wash.
>
> What we have called "kallitype" and what is in various manuals,
> dissertations and articles (especially the photo magazines of the early
> 1900s) by that name is similar to the platinum formula (fe something else
> (chloride?), & so forth) and is developed in chemicals, the most popular
> havin g been Rochelle Salts, or a variation thereof, which I found the
> worst -- shortest scale, grainiest highlights.
>
> I daresay it changes with different formulas, papers and developers, but
> in my experience the best developer was sodium acetate with tartaric acid.
>
> We had this on the list 2 or 3 years ago.
>
> Also, folks are talking about coating "sinking in." I rarely bet less
> than a million dollars, but ..... in my experience, except for pl-pd
> which just LOVES to sink in, there's rarely a sinking in problem in any
> medium if you're not heat drying. Then it probably isn't actual "sinking
> in," is it?, but the tones do get blown out.
>
> Most standard papers that are not "waterleaf," that is, that have a size
> in the making, do not need extra size. In my experience, vandyke brown
> was *worse* with every size I tried unless it WAS heat dried.
>
> When I used to heat dry (hairdryer) , before I figured that out, it
> usually needed an added size, and even then tended to plate out, which may
> be what you're talking about with "solarize"?
>
> That varies by the way, sometimes you see it wet & not dry, sometimes dry
> & not wet, and sometimes it appears in time, pretty at first and then
> blotches. I used to love it til I saw it was a time bomb. Sorry about
> that.
>
> Judy
>
>
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