Re: Gum over Palladium

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:

http://www.pacifier.com/~kthayer/

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.
Katharine

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) [mailto:C.Breukel@lumc.nl]
> Sent: 26 Ekim 2005 Çarþamba 10:53
> To: alt-photo-process-l@sask.usask.ca
> 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 [mailto:loris_medici@mynet.com]
> > Sent: woensdag 26 oktober 2005 9:51
> > To: alt-photo-process-l@sask.usask.ca
> > 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