From: Galina Manikova (email@example.com)
Date: 11/16/02-04:46:20 AM Z
I have been doing cyanotypes on glass for years. My process is described in
Christopher James book "Alternative photographic processes".
Basicly, it is cleaning the glass well and using an even layer of harded
gelatine as a base. Next you have to add a few drops of concentrated
gelatine into cyanotype emulsion before coating it on glass. Everything is
to be holdt warm: glass plate, gelatine/cyanotype composition, even the
brushes, if you are using them. The best is though to pour everything over
and let it run off. Coated plate is to dry on a leveled table, so as it does
not run to one corner of the plate.
The tricky part is to get a good gelatine coating. I do it 3 times with a
thin gelatine solution, instead of giving one thick coat. Watch for bubbles
! Everything will show through the emulsion !
This worked better for me then grounding or etching the glass, which was
eating up transparency.
It is so easy, that even my newbies at a private course were doing it
successfully last week !
So let us all make photographs on glass ! It is beautifull !
From: Jalo Porkkala [mailto:firstname.lastname@example.org]
Sent: 14. november 2002 23:36
Subject: cyanotype on glass
I searched the archives for "cyanotype on glass" but couldn't find anything,
although I'm sure it has been discussed before ...
So, can anyone help here, one of my students wants to print cyano on glass
plates (she's got beautiful x-ray images of animals) and she is going to use
some sandblasted figures on the same plates.
What would be good surface preparation for cyano sensitizer to adhere. We
plan to try gelatin (hardened with glyoxal?) and gum arabic with some
dichromate as sensitizer so we can harden with uv-light.
Anything else we could try ... ?
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