Re: gum negatives redux
OK...more pigment than 1 gr to 2 ml ?
You see, I guess I don't know what a good general ratio is for high, mids
and lows. I know pigment varies, colors vary, etc but I'll figger it out...
Thanks, Katharine...much appreciated...
p
----- Original Message -----
From: "Katharine Thayer" <kthayer@pacifier.com>
To: <alt-photo-process-l@usask.ca>
Sent: Monday, September 14, 2009 9:12 AM
Subject: Re: gum negatives redux
Sorry I'm late here; I was busy on a different project.
I'd say you didn't expose it long enough; it should be of course exposed
at least enough to retain DMax, which it doesn't sound like this was.
And no, I wouldn't say you should expect a much shorter development when
exposing for the shadows;. in order to express the detail in the shadows
it needs to be developed enough to open the shadows and to release any of
the darker pigment from the lighter midtones and highlights.
Ivory black is also a much weaker pigment than some of the other blacks,
like lamp black; you'd need to use more pigment to get a good dark. Hope
any of that is useful,
Katharine
On Sep 13, 2009, at 4:24 PM, Paul Viapiano wrote:
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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