Re: Coffee developer - Picture uploaded

John,

I would think that the missing ingrdient might be the potassium hydroxide ,
which according to "The Darkroom Cookbook" is supposed to act as a developer
accelerator. The print I've posted comes from my single experiment with
coffee developer. I really should get back to it.

Michael Georgoff was saying in a separate posting that he was going to get
some from Bostick & Sullivan at
http://www.bostick-sullivan.com/

I've bought from them and they are very good people. According to my
catalogue, the stuff is "caustic potash" and sells for $17.50 for 500gm from
them (plus shipping) (not exactly cheap!). I suspect that 500mg will take
you quite some distance with your coffee. The recipe calls for only 6
rounded teaspoons of the stuff per liter of coffee.

Best,

Guy

----- Original Message -----
From: "John Yeo" <jonnieo@thegrid.net>

> I tried developing a print in coffee once. It didn't work at all. I
mixed
> up instant coffee at twice the reccomended dilution, printed a picture and
> put it in. I didnt' use baking soda, I just assumed it was used to make
the
> soup less acidic. I didn't monitor the pH because it said the best pH was
> 9. I figured anything would work, but not be the best. It did not work
at
> all. I didn't do any exposure compensation, used ilford multigrade RC
> paper. and left it in the coffee for over an hour.
>
> Any suggestions to what could have gone wrong?
>
> John
>
> ----- Original Message -----
> From: "Guy Glorieux" <guy.glorieux@sympatico.ca>
> To: <pinhole-discussion@pinhole.com>
> Sent: Wednesday, December 13, 2000 5:42 AM
> Subject: [pinhole-discussion] Coffee developer - Picture uploaded
>
>
> > Hi all,
> >
> > I took the liberty of uploading a print illustrating the results of
> > processing a print in coffee developer, as per the article published by
> > Dr. Scott Williams from Rochester Institute ot Technology, at:
> > http://www.isc.rit.edu/~andpph/text-coffee.html
> >
> > The picture can be seen at:
> > http://www.pinhole.com/discussion/upload/images/pose_cafe.jpg
> >
> > Several words of caution though
> > 1. The picture was printed on the occasion of a special exhibition of
> > my photo club three years ago, entitled "Pose-Café" (Coffee Break). I
> > had suggested that we use this process to illustrate the point that
> > coffee is an integral part of the picture making process and that it can
> > find space even in the processing trays, rather than just the mug!
> > 2. The picture is not mine but was taken on a 35mm camera by one of my
> > fellow club member.
> > 3. The picture is not a pinhole (Gregg, I took your silence after my
> > last eMail on the subject as an implicit agreement that I could post the
> > picture for illustrative purposes).
> >
> > (I hope that I will not stir a debate over the use of the image area for
> > the list... This would be quite opposite to my intentions).
> >
> > I hope members enjoy the picture and that it will stir more interest in
> > this particular process.
> >
> > Best wishes,
> >
> > Guy Glorieux
> > Montreal, Canada
> >
> >
> > _______________________________________________
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> > unsubscribe or change your account at
> > http://www.pinhole.com/discussion/
> >
>
>
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Received on Wed Dec 13 12:34:15 2000