[Alt-photo] cyanotype over palladium
christnze at gmail.com
Sun Mar 6 11:41:09 UTC 2016
Personally i use a palladium print fully expose but Sotheby's input half
palladium and a full cyanobactéries fully expose
Le 5 mars 2016 20:31, "Bob Cornelis via Alt-photo-process-list" <
alt-photo-process-list at lists.altphotolist.org> a écrit :
> I’m going to try printing (Ware) cyanotype over palladium and have a
> couple of questions for those of you who’ve done this before. I’m using the
> QTR method of making digital negs.
> - if you have a custom QTR curve for palladium and cyanotype, is it best
> to use a different neg for the 2 processes?
> - any suggestion on how long the cyanotype exposure should be relative to
> what a straight cyanotype exposure would be?
> - any difference in the cyanotype chemistry (dilution, etc) to use given
> it’s over palladium?
> - is it true that, unlike gum, I don’t need to size/harden the palladium
> - any difference in processing the cyanotype? I been developing cyanotypes
> with 45 sec in water with 1 tbs citric acid, then 15 sec in water+peroxide,
> then 20 min in water bath
> - is it better to print the palladium differently somehow than how I’d do
> a straight palladium (more open shadows, for example)?
> I appreciate any up front pointers!
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