From: Dave Rose (cactuscowboy@attbi.com)
Date: 11/18/02-08:51:19 PM Z
I use both ammonium dichromate and potassium dichromate as saturated
solutions. AD is definitely faster and yields lower contrast than PD. In
producing multiple-layer gum prints, I've often used both sensitizers,
typically using AD (with minimal pigment) for delicate highlight tones and
PD to add strength in shadows and to provide good overall contrast.
Cactus Cowboy
Big Wonderful Wyoming
(snip)
> That leaves the question of contrast, whether the contrast is the same
> with similar % solutions, and since we (I mean gum printers as a whole)
> can't agree on how the contrast compares between the two compounds at
> saturation strength, I don't have a lot of hope whether this other
> question can be resolved any time soon.
>
> Katharine Thayer
>
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