Re: Attn. Chris + All. Gum, Gelatine + Direct Carbon.

[John Grocott <john.grocott403@ntlworld.com>]

Chris,
          I am sure Art's patented process would be very helpful to anyone 
looking for a good working procedure. Art also kindly sent me, years back, a 
copy of his patent. Maybe, one day, my own formula, which does not contain 
gum,  will be common knowledge. But I am afraid I am unable to share the 
results gained from so many hours of frustrating work without  the financial 
ability to commercialize it if it was viewed  to be viable.
          I wonder how Dave Soemarko feels about this issue? I guess I feel 
much the same as the Fressons. All the same, it would be great if some 
enterprising person were to start making the Direct Carbon paper, again. 
Then, all the new generations of young photo artists would have an extra 
medium with which to work. Maybe that's too sentimental  in this day and 
age.
                   One of the problems of commercially  making and 
marketing a DC paper would be the lack of any guarantee as to successful 
results. Maybe one reason the Fressons discontinued that side of their 
business.
                   Dick Sullivan mentioned, very briefly, in a recent List 
posting, the ''ARVEL'' process. This paper was made and  marketed by the 
Fressons for a period of approx. fifteen years prior to WW 2. ( Luis 
Nadeau).  This process did not require great attention to temperature 
control and development was exlusively by  weak  Sodium Hypochlorite 
solution and cold  water spray. Rather more like gum working. No messy 
sawdust needed. Here again, we have no published clues re. the emulsion 
formulae. Just imagine how popular this Arvel process must have been with 
amateur photographers when the war stopped everything short.
           We have a lot of catching up to do. Nice w/e.
   Later. John - Photographist - London - UK



----- Original Message ----- 
From: "Christina Z. Anderson" <zphoto@montana.net>
To: <alt-photo-process-l@usask.ca>
Sent: Saturday, May 26, 2007 4:16 PM
Subject: Re: Attn. Chris + All. Gum, Gelatine + Direct Carbon.
> John,
> Now, as far as gelatin and gum, Art was so kind a few years back as to 
> give me a copy of his patent.  I run across articles on Fresson every now 
> and again when researching gum, but of course, the articles are all sort 
> of like "Well, the Fresson paper MAY contain this..."
>
> The reason I am intrigued with the gelatin is that Echague said it 
> provided a much more stable layer to use sawdust development with.  But if 
> I remember (Art can chime in here?) gum and gelatin do not mix well.  But 
> my gum printing formula is essentially a 1:1  mix (tho I use stock pigment 
> mixes and use ammonium dichromate cut in half to a 15% dilution) so I 
> don't have a clue how much gelatine or how I would do it.''