From: Ed Buffaloe (EdBuffaloe@UnblinkingEye.Com)
Date: 03/08/03-12:36:48 PM Z
Hmm. I thought you had used 24% dichromate. I really think what I have is
an overexposure. I'm going to try soaking for 3 or 4 days and see what
happens.
----- Original Message -----
From: "Christina Z. Anderson" <zphoto@montana.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, March 08, 2003 12:11 PM
Subject: Re: First Gum Print
> Ed, did you get my jpeg? Did you get it to work for you? I am pretty
sure
> your problem is that you are using Fabriano Uno, not Rives, brushing too
> thick a coat, and/or overexposing too much. My exposure was 12 and 24
> minutes under UV and both worked. I brush developed with a hake brush.
My
> lamp black was D Smith. But my prints all developed out in well under an
> hour. I used D. Smith gum, and a did I say 12% solution of am di. OH, my
> light unit is the Jon Edwards box with BL bulbs. I would wager a bet the
> biggest problem is overexposure, because if I was able to do this high a
> ratio with 5 different pigments, I would think it should work. I could
scan
> the other pigments, too, and send you a jpeg.
> I mixed the gum/pigment equally with the sensitizer. Now I am going
to
> weigh inches of worms of pigment and see how that relates...
> Hey, guess what Arnold Gassan says: (my last bits of gum research
were
> completed today) that, contrary to popular opinion, gum *is* sensitive
when
> wet.
> OH, and Judy, I have another varnish for ya, from Abney's Platinotype
> book (1898) by way of Vidal's article in the following mag (1886): 1/2 oz
> borax, 1 dram sodium carbonate ( 3.6ml of powder? How is a liquid
> measurement made of a powder??) in 10 oz water. Add 2 oz. white powdered
> shellac. Boil until the shellac dissolves (Photographic News p. 829).
> OR, burnish with Castille soap dissolved in alcohol. These are both
> platinum methods of gloss, not specifically related to gum.
> Chris
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