Smieglitz@aol.com
Date: 05/27/01-05:46:35 PM Z
In a message dated 05/27/2001 18:18:38, nick@mcn.org wrote:
<<Joe, when you referred to having sprayed some film with acrylic, it
occurred to me that it might be possible to spray a piece of clear acetate
and obtain the same effect. I suppose it boils down to whether the spray
was applied before or after printing. I guess my question is, does the
Krylon Crystal Clear acrylic spray cause the ink to adhere or does it
protect the ink?
>>
The ink (Cone Tech Piezography BW) appears to dry within a few minutes.
Being carbon pigment-based it appears to sit on the surface of the Pictorico
transparency material as a fine powder deposit although some of it obviously
sinks into the coating of the transparency since I can rub off the surface
deposit and still have an image beneath. I apply the acrylic spray after
letting the printed image sit for about a half hour. It doesn't run or
degrade the deposit as far as I can tell, but I haven't had the chance yet to
see if it affects the printing characteristics (i.e., UV transmission). It
causes the image to adhere and makes it quite resistant to scratching, so I
guess the answer to your question is yes on both counts.
I don't know what effect it would have if sprayed before being printed, but
it would give the acetate a fine tooth that perhaps the ink would adhere to.
I'm not getting any ink pooling, bleeding or other problems I've experienced
with other transparency brands when I use the Pictorico OHP material, so
those problems have been eliminated with the setup I am using. The remaining
problem would seem to be building up enough ink density for processes like
VDB, Pt/Pl, cyanotype, etc.
Joe
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