Re: Ammonium Citrate


William Laven (wmlaven@platinotype.com)
Fri, 09 Apr 1999 17:29:27 -0700 (PDT)


>I've recently started Pt/Pd printing, and I need some opinions. I'm using
>only palladium at the moment until my skills are up to spec. I'd like to
>produce some cooler tone
>images and I'm wondering if Ammonium Citrate developer is the way to go. All
>of the references to it in the archives seem to be negative. Should I just
>spring for some platinum and
>get the color I want that way, or is this developer a good
>alternative? I am currently using potassium oxalate, coating on Arches
>Platine, and controlling contrast with the ratios of ferric ox #1 and #2
>(usually 3:1). What drawbacks, if any, will I encounter using Ammonium
>Citrate with these materials?
>Thanks.
>
>Steve

Ammounium Citrate is cooller than P.O., but its slower, too, requiring
slightly longer exposures which you may or may not consider a drawback.
Platine is one of the cooller papers and is a good choice; Cranes
Parhchmonet from Bostick & Sullivan is cool also as is Arches Aquarelle.
Try them and compare. You could try Palladio's cold tone developer; its the
coolest image I've seen, but also pretty grainy.

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