CCBaggett@aol.com
Date: 04/11/02-05:11:28 PM Z
In a message dated 4/11/02 12:38:50 AM Eastern Daylight Time,
kthayer@pacifier.com writes:
>
> Sandy King wrote:
> I would
> > suggest that there is a much higher probability of some other
> > explanation for David's result. Perhaps his gum got fogged from the
> > long exposure - heat from the exposing light for an hour
>
> If he got the result only from the 1- hour exposure, of course simple
> overexposure would be the most likely explanation for it, and if he was
> using a hot light without a cooling fan, his emulsion would surely be
> cooked. But what he said was that he made a series of test exposures,
> from 1 minute to 1 hour, and got the same result at all exposures, which
> makes it quite unlikely that his result was primarily related to the
> length of exposure.
> kt
>
Sandy and Katherine,
It could be something silly. After I received PFJ #1 I decided to try
gum. I have been printing pt/pd since the mid-70's. For my first print I used
some gouache I purchased at the art store. I got a blank page- no picture. I
sent an email to Judy and after a couple of exchanges it was decided to start
over and follow the directions in PFJ#1. (I resort to directions when
everything else fails.) This time I used W+N watercolor paint and voila- a
picture. I wouldn't elevate it to the status of print. Several weeks later,
still curious at the total failure, I looked at the tube. It was acrylic- not
water soluble. Doh! More recently I decided to try a casein print. I bought
some Shiva casein paint and casein medium. I realized that the medium might
not work. It didn't. However, when I took the exposed paper out of the frame
and looked at it there was a faint image like gum. I guess it was the
dichromate which washed off the insoluble medium. Since I have tried Lukas
Werth's approach in PFJ#6 and made a casein print. I haven't recovered from
the ammonia in my 7'x7' darkroom. I'm kidding, but it was pretty unpleasant.
This weekend I am going to try caseinate made with Borax instead.
One other point. My negatives are developed in Pyrocat-HD for pt/ag
printing. My previous negatives were developed in Rollo Pyro for pt/pd. I
have used both as well as my older negatives (developed in D-23 or HC 110 for
pt/pd) for Ware's cyanotype, argyrotype and gum. They obviously are not
optimized for all processes, but they print and are are workable.
Cheers,
Charlie Baggett
This archive was generated by hypermail 2b30 : 05/01/02-11:43:29 AM Z CST