Re: carbon transfer from plexi question

Luis Nadeau (nadeaul@nbnet.nb.ca)
Sat, 06 Jun 1998 22:23:32 -0300

At 2:26 PM -0700 98/06/06, Tom Hawkins wrote:
>Listmembers,
>
>In attempting to transfer some monochrome carbon images (test negatives and
>accompanying steptablets) from temporary plexiglass supports to final
>support paper, I've encountered a problem:
>
>After the image is transferred and the paper is dry, the most dense
>highlight areas, as well as the unexposed (safe edge) areas, have flaked
>off.
>
>I've not had this occur in previous printing sessions.
>
>The papers used for this printing session are more heavily sized than in
>earlier sessions. These papers received a 7% size, hardened in glyoxal.

This is where your problem is.

>Previous, successful, transfers from images developed on plexi were done on
>papers with a 3% size.
>
>Have I sized the paper too heavily? I'm working with Fabriano Uno, Fabriano
>Artistico, and Rives BFK.

I don't know which book you are using for formulas but regular Final
transfer papers made of *hardened* gelatin coatings should be avoided for
double transfer carbon (i.e., from plexi). Normal formulas call for a
relatively thick layer of *slightly* hardened gelatin, e.g., 10% gel with
potassium alum (not chrome alum) and certainly not glyoxial or formalin.

Are you the one who sent me a carbon print lately? If so, more offlist.

Luis Nadeau
NADEAUL@NBNET.NB.CA
Fredericton, New Brunswick, Canada
http://www3.nbnet.nb.ca/nadeaul/