[alt-photo] Re: OLDER PT/PD COATED PAPER, WARMER TONE?
EJ Photo
ejnphoto at sbcglobal.net
Sun Nov 27 18:00:42 GMT 2011
Well, unless you've tested that method with an bit more science, I'd doubt
the range that you have achieved to be totally accurate and while it may be
even and some point, it may not be the best method. How long are you doing
the humidifying? 1/2 hr?
Aging of coated paper may be the issue, as in the pd, and pt are having some
time to comingle and having some bonding changes take place. If it is an
aging thing, I'd suspect we could find out by sealing a piece of dried paper
and resting it for the day or two, and then doing the humidification process
just as you normally do it. If it's a water/humidity contribution, I'd
expect less or no change as your method stayed the same. If there is a big
change, I'd expect it would be due to a chemical reaction we can't easily
measure.
I have an enclosed box that my coated paper hangs in with constant air
circulation with a humidifier (water wicking and fan) and an additional
small fan. My paper hangs for a minimum of 1/2 hr.
Eric Neilsen
Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas, TX 75226
www.ericneilsenphotography.com
skype me with ejprinter
Let's Talk Photography
-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
BOB KISS
Sent: Saturday, November 26, 2011 1:56 PM
To: 'The alternative photographic processes mailing list'
Subject: [alt-photo] Re: OLDER PT/PD COATED PAPER, WARMER TONE?
DEAR ERIC,
I have always humidified the same way: a pan of boiling water with
a spatter guard screen over it. I hold all paper exactly the same height
above the pan (marked on the wall behind the sink) so that the steam is cool
and wet. I also humidify each size paper for the same time, less for 11x14
more for 20x24. This is rather well controlled so I don't believe it is a
variable. The only variable that I can see if the aging of the coated
paper.
CHEERS!
BOB
-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
EJ Photo
Sent: Saturday, November 26, 2011 3:18 PM
To: 'The alternative photographic processes mailing list'
Subject: [alt-photo] Re: OLDER PT/PD COATED PAPER, WARMER TONE?
Well, I can't say that I've seen it in a while. I can say that Pt Pd mixes
have a warmer look than a fresh mix. In other words, if the mix you use is
3:1 and you always use it that way, you can pre mix it; put both in a bottle
and rather than measuring a portion of Pt and of Pd each time you coat you
simply use your 3:1 mixture, Yes that will be warmer. Would I expect to see
it show up in a coated piece? maybe. I also suspect that unless you are
careful about how you humidify, the real humidity in the paper may be
different than that of your measured amount; different amount and you have a
different color print.
How do you humidify your paper?
Eric Neilsen
Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas, TX 75226
www.ericneilsenphotography.com
skype me with ejprinter
Let's Talk Photography
-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
BOB KISS
Sent: Friday, November 25, 2011 5:34 PM
To: 'The alternative photographic processes mailing list'
Subject: [alt-photo] Re: OLDER PT/PD COATED PAPER, WARMER TONE?
DEAR MARK,
As mentioned, the process is exactly the same as those that are less
warm except that this paper aged 3 days. And, yes, the paper is cleared
(small unexposed dot on boarder). Just warmer.
CHEERS!
BOB
-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Mark Nelson
Sent: Friday, November 25, 2011 7:30 PM
To: The alternative photographic processes mailing list
Subject: [alt-photo] Re: OLDER PT/PD COATED PAPER, WARMER TONE?
does it clear ok?
Best Wishes,
Mark Nelson
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On Nov 25, 2011, at 4:15 PM, BOB KISS wrote:
> DEAR LIST,
>
> I just had an interesting experience with DOP pt/pd printing
and
> wanted to know if others had the same.
>
> I use COT 320 paper with a high PD to PT drop ratio and process
> in POT OX at 40 C. On Tuesday, I coated a small sheet that I cut up into
> test strips. The strips used that day as well as the large sheet on which
I
> made the final print all had the usual lovely slightly warm tone to which
I
> am accustomed. Today I used the remaining test strip, re-humidifying it
> just as I had all the others, but this test strip looks a much warmer
brown,
> nearly chocolate.
>
> Has anyone else experienced this; if you coat, wait a few days,
> re-humidify, expose, and process as usual, do you get a warmer toned
print?
> This would be great to know when I want something very warm.
>
> As I only have a sample size of one, the ghosts of Rickmers and
> Todd are chiding me to experiment and increase the sample size but it sure
> helps to know if anyone else has experienced this.
>
> CHEERS!
>
> BOB
>
>
>
> Please check my website: <http://www.bobkiss.com/>
http://www.bobkiss.com/
>
>
>
>
> "Live as if you are going to die tomorrow. Learn as if you are going to
> live forever". Mahatma Gandhi
>
>
>
> _______________________________________________
> Alt-photo-process-list | http://altphotolist.org/listinfo
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