Re: gum negatives redux
Katharine & Jim...
I tried the ivory black at 1 gram / 2 ml gum in a 1:1 ratio with the pot
dichromate.
Exposed for approx half my highlight exposure, but at 25 min in development,
there was hardly any black pigment left on the print.
I need to step-tablet this negative and try a few different
pigments...but...
When doing an exposure for the shadows, would you expect a much shorter dev
time?
Paul
----- Original Message -----
From: "Katharine Thayer" <kthayer@pacifier.com>
To: <alt-photo-process-l@usask.ca>
Sent: Saturday, September 12, 2009 6:17 PM
Subject: Re: gum negatives redux
Suggestion: I'd use ivory black, not too heavy (at a medium-heavy
concentration, it's a lovely dark chocolate brown color, the color of
bittersweet chocolate) to fill in the shadows; that would anchor your
image well, IMO.
The pigment concentration should vary with the pigment, but what you're
done here looks okay to me. The earth pigments are weaker as a rule than
some others, but your burnt umber looks good there for midtones. You'll
never be able to print the burnt umber dark enough to really give dark
shadows, it's not in its nature, which is why I'm suggesting ivory black
for the darker parts.
Glad you're having a printing day that doesn't require chugging the
Everclear,
Katharine
On Sep 12, 2009, at 5:54 PM, Paul Viapiano wrote:
1st layer: Burnt umber 5 1/2 minutes
2nd and 3rd layers: Raw umber 2 1/2 minutes (1 gr pigment / 2 ml
gum) Is this concentration high enuff?
I think 2 1/2 min is not enough time with these Pd negs...I'm thinking 3
1/2 m
p
----- Original Message ----- From: "Katharine Thayer"
<kthayer@pacifier.com>
To: <alt-photo-process-l@usask.ca>
Sent: Saturday, September 12, 2009 5:30 PM
Subject: Re: gum negatives redux
Yeah, I'd say hit it with a really heavy pigment concentration for a
short time for darker shadows. What's your pigment?
kt
On Sep 12, 2009, at 5:00 PM, Paul Viapiano wrote:
Well, not finished yet...needs some more shadow work...but...
http://wwwflickr.com/photos/viapiano/3913318805/
----- Original Message -----
From: Jeremy Moore
To: alt-photo-process-l@usask.ca
Sent: Saturday, September 12, 2009 4:34 PM
Subject: Re: gum negatives redux
Any scans or shots of the images? There has been a dearth of new alt
prints in my life as of recent.
On Sat, Sep 12, 2009 at 2:42 PM, Paul Viapiano <viapiano@pacbell.net>
wrote:
I should've been more clear...I'm getting better gum results from
palladium negs than using less contrasty negs for gum. My palladium
prints print wonderfully with the palladium negs ;-)
This would be a huge advantage for me, in not having to keep track of
two different styles of digital negatives.
Now, I'm wondering how the palladium negs will work with tri- color
gum...only one way to find out!
Paul
----- Original Message -----
From: "Paul Viapiano" <viapiano@pacbell.net>
To: <alt-photo-process-l@usask.ca>
Sent: Saturday, September 12, 2009 12:20 PM
Subject: gum negatives redux
> Hi all...
>
> I'm getting much better results using my QTR inkjet palladium
negatives for
> pure gum purposes. Detail is much sharper with these contrasty
negs and I'm
> getting a pretty full range of tones.
>
> Exposures with 1:1 gum/dichromate ratio (pot di) are 6-7 min for
highlights,
> 2 1/2 min for shadows and mids somewhere btw those.
>
> This is for exposure in full blazing blue sky sun, Southern
California
> style.
>
> Still adjusting and experimenting, but happy to have a printing
day that is
> not frustrating ;-)...of course, it's not over yet.
>
> Paul
>
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