Re: Gum over Palladium

From: Katharine Thayer ^lt;[email protected]>
Date: 10/26/05-03:46:59 AM Z
Message-id: <>

Hello Cor,
If you use a transparent pigment, then follow Loris' instructions -- a
light pigment mix, more exposure, enough dichromate to keep the contrast
reasonable (not too high)-- you should be able to get the result you
want without having to create special masks or tediously brushing gum
off shadow areas during development. A transparent pigment shouldn't
show over the dark areas. There's an example of what I'm talking about
(in tricolor gum rather than gum over palladium, but I assume it
operates similarly) here:

I printed a layer of strong transparent yellow over the entire print,
after printing the initial three color layers, to correct the color
balance; you can see that the yellow simply doesn't show over the darks,
since it is a transparent pigment. The advantage of doing it this way is
that when you're done you'll have a uniform surface look over the entire
print, depending on whether that's what you want, of course. And it's
easier than the other suggestions. If I knew what color you're aiming
for, I may be able to suggest a transparent pigment, if you don't
already have one in mind.

Loris Medici wrote:
> I see..
> Anyway, my way of thinking was as following: Less pigment will veil the
> shadows less but in the same time its effect in highlights will be more
> subtle. More dichromate/exposure is for decreasing the contrast of the
> resulting gum layer: if contrast is high then you will get tone in the
> shadows but not in the highlights (you want the opposite). Plus, if you
> don't like the effect of gum exposure in the shadows you will need some
> delicate brush work - probably hard to do with 4x5 prints.
> Regards,
> Loris.
> -----Original Message-----
> From: Breukel, C. (HKG) []
> Sent: 26 Ekim 2005 Çarşamba 10:53
> To:
> Subject: RE: Gum over Palladium
> Hi Loris,
> Indeed the digital route is a possibility, am just not prepared (yet?)
> to go down that road, I prefer the traditional way...
> Best,
> Cor
> > -----Original Message-----
> > From: Loris Medici []
> > Sent: woensdag 26 oktober 2005 9:51
> > To:
> > Subject: RE: Gum over Palladium
> >
> >
> >
> > This is more a question than it is a suggestion: I would try... less
> > pigment and/or more dichromate and/or more exposure and/or very soft
> > brush(es) to remove the hardened emulsion from the shadows (maybe
> > dropping water gently with a baster?)... What our experienced gum
> > printers think?
> >
> > My "real suggestion" would be printing with digital negatives (one for
> > the Ziatype, one - modified just for printing highlights - for the gum
> > layer)...
> >
> > Regards,
> > Loris.
Received on Wed Oct 26 10:42:30 2005

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