From: Sandy King (sanking@clemson.edu)
Date: 12/31/03-10:15:49 PM Z
Judy Seigel wrote:
>
>However, a propos of the discussion of platinum vs kallitype, I'd agree
>100% with her assessment that kallitype frees you to "push limits,
>experiment and work large." As I recall, she was working 24 by 30 inches
>at least some of the time -- with digital negatives from a large HP
>printer. I don't think that's a size one undertakes casually and
>"experimentally" in platinum.
That is certainly a good point. I asked a question yesterday about
cost and would still like to know the answer from one of our Pt/Pd
printers. What would be the cost in chemistry alone to make a mixed
platinum/palladium print of about 20X24" in size, assuming that one
buys the chemistry from a place like B&S or the Formulary? I have
made a few Platinum coated kallitypes of this size and can tell you
that the cost is not insignificant when you are just using the metal
to tone the print. I suspect that the cost to make a Pt/Pd print
might take my breath away.
> (I certainly wouldn't.) As for the
>relative difficulty, she says that although fixing is an extra step, the
>clearing is much quicker with kalli, so the total time is comparable.
That is a point I had forgotten in my reply yesterday to Carl. I
clear kallitypes for three minutes, but in most cases, and especially
with the sodium citrtate developers, prints come out of the developer
completely clear and don't really need further clearing.
>
>I do remember, for what it's worth, the advice that came with ammonium
>citrate developer from B&S for platinu/palladium -- that the more you use
>it the better it gets. Is that still operative ?
Yes, I read that somewhere. Perhaps the ammonium citrate developer,
which I have not used, works differently for kallitype than sodium
citrate and sodium acetate.
Sandy
>
>Judy
>
>>
>> ON p. 22, in discussing the kallitype developer, Carmen write,
>> "Finally, don't throw out your used developer; the more you use it
>> the better it gets." My experience is slightly different. What I have
>> found is that as a sodium acetate or sodium citrate developer is
>> re-used there is an increasing tendency for the paper to develop a
>> stain in the sensitized but unexposed areas of the print, and after a
>> certain point the stain becomes so severe that it is not possible to
>> clear it completely in the clearing bath. The only way I have found
>> to prevent this stain with used developer is to replenish the
>> developer, which I keep in one-liter containers, at the rate of about
>> 200ml of fresh solution for approximately every 500 square inches of
>> image area developed.
>>
>> I would be interested in Carmen's comments on this, as well as
>> comments from other kallitype printers. Comments from platinum
>> printers also appreciated since there may be a common thread here on
>> developer exhaustion.
>>
>> Sandy
>>
>>
>>
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