From: Sandy King (sanking@clemson.edu)
Date: 04/26/03-08:36:33 AM Z
Peter,
Jumping Jupiter!!! You would classify all of the iron oxalate
processes together? Including Pt/Pd?
And if so, what must the Pt/Pd devotees think of lumping together
the lowly kallitype with the elegant, precious and highly exalted
Pt/Pd? Hard to imagine the consternation that your remarks must have
caused among those folks.
Sandy King
>Sandy,
>
>I'd tend to agree with you, and possibly even go a little further. When I
>was playing with these processes I worked with a common ferric oxalate
>sensitiser that could end up producing silver, platinum or mixed silver
>platinum prints. I also made a gold print with it, though not as
>successfully as I would have liked, and some of the platinums were
>platinum/palladium mixtures.
>
>Glycerine development was used for platinum papers, notably by Stieglitz,
>so I don't think much is new there.
>
>So I tend to classify about all of the iron oxalate based processes
>together, not just kallitype and Satista.
>
>Peter Marshall
>Photography Guide at About http://photography.about.com/
>email: photography.guide@about.com
>_________________________________________________________________
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>and elsewhere......
>
>> Peter Marshall wrote:
>>
>>
>>
>> >
>> >Sandy,
>> >
>> >1. When I tried out the process, the point seemed to be that they were
>> >visually identical to platinum and platinum-like kallitype prints.
>> >
>> >2. Satista has a cost advantage over platinum, which was the reason for
>> >its introduction. I think the archival properties are likely to be
>> >dependent on the amount of iron left in the print and the state of
>> >division of the silver in the image. Platinum toning has been claimed
>> to
>> >increase the stability of kallitypes.
>> >
>>
>>
>> I don't want to make too big a deal of a name, but after reading a
>> little more about Satista I am inclined to classify it as a variation
>> of traditional kallitype (based on ferric oxalate). Virtually
>> everything that you do with Satista can also be done with traditional
>> kallitype and the only really unique aspect, at least to my way of
>> thinking, is the glycerine development procedure. And of course if
>> you look at the history of kallitype you will find that there have
>> been many variations on develoment over the years. Stevens, for
>> example, describes kallitype as Type I and Type 11, with the major
>> difference whether the silver is incorporated into the sensitizing
>> solution and coated on the paper, or incorporated into the developer.
>>
>>
>> Note: I do not consider VDB a form of kallitype. VDB is based on
>> ferric ammonium citrate and the final result does not have the
>> richness of a kallitype based on ferric oxalate.
>>
>> So, for what it is worth there appear to me to be three major
>> variations of the silver-iron process being practiced today.
>>
>> 1. Kallitype, based on ferric oxalate, including Satista and both
>> Type 1 and Type 11 kallitype as described by Stevens.
>>
>> 2. VDB, based on ferric ammonium citrate.
>>
>> 3. Argyroptype, based on silver oxide.
>>
>>
>> Sandy King
>> --
>>
>>
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