Re: Re: Question for Ryuji about Amidol

Sorry for butting in, in looking at my old lab note book (hard copy) film with
Amidol

Water 1000cc/ml
Sodium Sulfite (anhydrus) 20 grams
Amidol 7 grams
Potassium Bromide 1.4 to 2 grams

For film and plates Time 3 to 5 min at 65/f

I did not note the source

Jan Pietrzak

>
> From: Philippe Ayral <payral@Club-Internet.fr>
> Date: 2004/04/04 Sun AM 07:59:51 GMT
> To: alt-photo-process-l@sask.usask.ca
> Subject: Re: Question for Ryuji about Amidol
>
> Can you share an Amidol formula for films for pd/pt printing ?
>
> --
> Philippe Ayral
> http://perso.club-internet.fr/payral
> http://www.focale.ch
>
> LCFSHEEN@aol.com a écrit:
> > In a message dated 03/04/2004 18:34:17 GMT Standard Time,
> > sanking@clemson.edu writes:
> >
> >> LCSheen indicates the possibility of making perfect negatives for
> >> Pt/Pd with two minutes of development in Amidol, presumbably using a
> >> continuous tone fillm.
> >>
> >> Is this possible? And I wonder if you might comment on the use of
> >> Amidol as a film developer?
> >
> >
> >
> > Sandy
> >
> > It is possible.
> >
> > In fact, if you look in the manuals, you will find amidol listed as a
> > film,. paper and b&w tranparency developer.
> >
> > I have been using amidol for more than twenty years and so have many
> > of my students and colleagues. Maybe I should not give away trade secrets.
> >
> > I have used amidol with Agfa NP31p, Kodak Sep Neg 1 and 2, and Ilford
> > FP4 and Dupont graphic arts films.. It works just as I have said for all
> > of them. They all have or had traditional grain structure which allows
> > development beyond 1.8. You will see many platinum prints in
> > international exhibitions developed in amidol or PQ in this way which
> > enables the full potential of the platinum process to be used.
> >
> > With FP4 exposed at ISO 32, the development times for different
> > processes are:
> >
> > Silver gelatine 90s
> >
> > Cyanotype (traditional) 1m 45 s
> >
> > Kallitype and salt 2m
> >
> > Platinum 2m 15 s (and cyanotype rex)
> >
> > Carbon 2 45 s
> >
> > Be sure to place the film in the developer emulsion side down and then
> > flip it. Agitation should be from one corner of the dish.
> >
> > These times may vary slightly but they are a good basis for experiment.
> > They are so consistent that I have given up using neg sheets.
> >
> > Of course, when platinum was at its height, iron based developers were
> > more often used. It is often worthwhile to consult British Journal of
> > Photography Almanacs from the 1870s onward.
> >
> > M
>
>
Received on Sun Apr 4 08:20:24 2004