From: Sandy King (sanking@clemson.edu)
Date: 05/19/03-09:02:23 AM Z
Cor,
The kallitype article is now up on Unblinking Eye. The direct link to
the article is
http://unblinkingeye.com/Articles/Kallitype/kallitype.html
There is another gold toning formula in the article that has slightly
different working characteristics than the one based on citric acid.
Perhaps someone else can comment on Reilly's remarks about acidic
gold toners. I am aware of a need to print slightly deeper when
using gold toner than when using platinum or palladium toners. As I
note in the article, with gold toners "image contrast is increased by
about a step through loss of density in the high values, but Dmax
values (shadows) are changed little if at all." With one recent image
I needed an exposure of 250 units with a gold-toned print to get the
same final density as 230 with a palladium-toned print.
However, even with the acidic gold toner the maximum density of the
gold-toned kallitypes I have made is as high as those toned with
palladium and platinum toning. On Stonehenge paper the reflective
reading of both is around 1.52. Those who print on art papers such as
Stonehenge with either kallitype or Pt/Pd will recognize that this is
a very high maximum density and about the maximum achievable with
either process.
Sandy
>To Sandy and everybody else who wants to contribute,
>
>I have been printing Kallitypes lately, following the procedure as Sandy
>King had nicely wrote down and distributed to the list. The results are very
>nice.
>
>When you use a gold toner before the fix, the colour of the final print is
>determined by the gold toner, not by the developer, Sandy told me. This
>makes ofcourse sense.
>
>But there are quite bunch of different gold tonere formula's around, so I
>was wondering if these different formula's give different colours in the
>end?
>
>And related: Sandy uses an acid Gold toner (citric acid), but according to
>Reilly (The salted paper and albumen print book, or something similar as
>title), warns against using acidic gold toners, they are supposed to result
>in a weaker image (by heart; an acidic goldtoner replaces an silver atom
>1:1, a basic one 1 silver for 3 gold)?
>
>thanks & best,
>
>Cor
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