From: Kerik Kouklis (kerik@kerik.com)
Date: 04/10/02-05:03:33 PM Z
Here's perhaps some pertinent info or at least a bit of trivia on this
issue. All of my negatives are Pyro negs and have been for many years.
I use them for platinum and now for gum over platinum. I use both a
NuArc mercury vapor plateburner and a homemade UV box with Philips tubes
(actinic or super-actinic I think, it's been a long time).
For the effect I am after, my gum exposures are typically about 1/2 the
time of my platinum exposures. Even when I do a strait gum, if I try the
same exposure I use for a platinum print, the gum will be overexposed.
For whatever that's worth...
Kerik
> And my point was the converse of yours, that if the negative doesn't
> block the wavelengths in question well, it doesn't matter how long you
> print it, all you're going to get is overexposed mud, which is what I
> got with a color table negative and what David apparently got with his
> pyro negative, on gum.
> kt
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