Re: Yupo, was Re: Temperaprint & Gum

Kate,

It's like coating the hood of a freshly waxed Buick. It indeed puddles. I
suppose what I did was fill in the holes and wiped of the surface moisture.
It's very odd material and perhaps worth experimenting with. There are
synthetic paper like products for inkjet printing that act all intents the
same as they are also microporous. I is almost a certainty that if it works
for you on one of these these, Melinex will work as well. Almost all the
shiny glossy pro inkjet materials are now microporous. The also have some
with a matte surface material that is clay coated -- but I think this is
something different from what is known in the printing trade as clay
coated. Colloids won't stay on this stuff any better than hair stays on
Bruce Willis.

If anyone knows of a smooth gel coated paper that is not microporous and
not enlarging paper please let me know.

--Dick

At 03:37 PM 3/13/2004, you wrote:
>So why did you wipe it Richard? Does it pool on the surface? I think the
>left part of the image looks not too bad...what if you used two coats?
>
>Kate
>----- Original Message -----
>From: "Richard Sullivan" <richsul@earthlink.net>
>To: <alt-photo-process-l@sask.usask.ca>
>Sent: Sunday, March 14, 2004 10:29 AM
>Subject: Re: Yupo, was Re: Temperaprint & Gum
>
>
> > This thread got me to doing a quite experiment.
> >
> > As far as the archivalness of Yupo which is biaxially oriented
> > polypropylene (BOPP) it is in the mid category, whatever that might be.
> >
> > Modern plastics are far better than they were 25 years ago and do get
> > unfairly bad mouthed. "Paper has proven itself..." "You can't trust
> > accelerated testing ..." blah blah, are thrown out, and yes there is a bit
> > of truth to them. That being said there are some modern materials that are
> > considered to be in the archival category The most intriguing one is
> > Melinex, a Dupont special form of Mylar which is designed for archival
> > applications. Some Ilford color "papers" are on Melinex film. Wilhelm
>rates
> > Ataraxia's color carbons on Melinex at grater than 300 years and I suspect
> > the color pigment is the limiting factor and not the Melinex.
> >
> > I had some microporous Melinex here designed for inkjet printing.
>Virtually
> > all of the new inkjet materials are microporous, that is they have been
>hit
> > with some kind of electronic field that puts zillions of very tiny holes
>in
> > the surface. These holes are in the micron size, extremely tiny. For some
> > reason the newer pigment inkjet inks will not stick to gel coated paper so
> > they've gone to this system.
> >
> > Colloids stick well to Melinex and it makes a nice support for carbon
> > prints. I suspect Petes temperaprint system would work on it as well and
> > perhaps a good surface for gum printing.
> >
> > Just for fun I coated it with some vandyke solution. I brushed it on and
> > then wiped it off with a paper towel leaving only that which went into the
> > holes. I suspect I printed it while part was wet so thus the streaks.
> >
> > The dmax is about 1/2 of what one would want.
> >
> > The image is at: http://www.photohistorycenter.org/Melinex1.htm
> >
> > Ok, so what? A bad image. But something to think about. It may be useful
> > for other things or maybe a way to up the dmax. A start perhaps in a new
> > direction.
> >
> > --Dick
> >
> >
> >
> > At 10:10 PM 1/30/2004, you wrote:
> > >Loris,
> > >
> > >No, Yupo did not absorb the sensitizer. It just set on the surface and
> > >waited to dry, with some puddles. Evening out the sensitizer over the
> > >paper, without streaking, was the main problem. Try to apply a coating of
> > >vandyke, kallitype or pallaidum sensitizer to a sheet of plastic and you
> > >will see what I mean.
> > >
> > >I may try Pete's suggestion and add a bit of colloid to the sensitizer
>and
> > >try again. Would this make the coating an emulsion?
> > >
> > >
> > >
> > >Sandy
> > >
> > >
> > >
> > >
> > >
> > >>Sandy, how did you manage to coat kallitype emulsion to Yupo? Does it
>absorb
> > >>the emulsion or you coated a "primer" (gelatin and such) before? What
>were
> > >>the problems when coating kallitype?
> > >>
> > >>Regards,
> > >>Loris.
> > >>
> > >>----- Original Message -----
> > >>From: "Sandy King" <sanking@clemson.edu>
> > >>To: <alt-photo-process-l@sask.usask.ca>
> > >>Sent: Friday, January 30, 2004 6:20 PM
> > >>Subject: Yupo, was Re: Temperaprint & Gum
> > >>
> > >>> ...
> > >>> I have used Yupo as a base for making carbon tissue and in this
> > >>> application it works very well. I have also attempted to print on it
> > >>> with kallitype and palladium but with mixed results. If one could
> > >>> ...
> >
> >
> >
> >
Received on Sun Mar 14 11:18:31 2004