From: Jack Brubaker (jack@jackbrubaker.com)
Date: 03/04/03-04:51:38 PM Z
Almost any paper or paper like material can be gum printed on. The only
limitation is does it fall apart in the developing water. This is not to say
that all paper will make a print you will love. If your image falls off in
water try more exposure. Try thinner coating. Too-thick coating is the most
common way to get no print. The light hardened gum is seperated from the
paper by gum that didn't get hardened. In development that unhardened layer
wshes away...taking the image with it. It might have been a good image but
you'll never know. For cheap printing practice with pages pulled out of
better sketch books, or buy better paper on line and cut it down to size.
Large sheets of Fabriano Uno and Artistico are not expensive per print when
making small prints. Sizng is helpfull for keeping the pigment from reaching
the paper and getting caught there. As long as you are starting do one coat
prints on paper that is well sized during manufacture. The Fabriano papers
listed above will do that easily if you don't preshrink or multiple layer
print. Once the paper has had a soak in water it opens its structure and is
less likely to release the pigment from later coatings. Some printers have
success multiple printing and preshrinking without puting a more durable
size on the paper. Most printers use a size on all but single coat gum.
Single coat gum can be wonderfull. Enjoy it as practice and a confidence
builder before you worry about more elaborate methods.
Jack Brubaker
> From: Matti Koskinen <mjkoskin@koti.soon.fi>
> Reply-To: alt-photo-process-l@skyway.usask.ca
> Date: Tue, 04 Mar 2003 21:34:09 +0200
> To: alt-photo-process-l@usask.ca
> Subject: gum printing papers
>
> hi
>
> I'm having trouble with watercolor papers. The cheap one, that would be
> ideal for practising doesn't hold the pigments, they just get off from
> the surface. I bought two sheets of Saunders 300gsm paper and the prints
> are ok. But here one sheet costs $6 and as 99% of my prints fail, it's
> getting too expensive. What kind of paper should do the job well for
> practising? Does some sort of sizing help?
>
> Does anybody have a curve for producing digital negatives for gum print?
> I'm using Gimp, so a curve posted for cyanotype recently is the format
> I'm searching for.
>
> TIA
>
> -matti
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