U of S | Mailing List Archive | alt-photo-process-l | Re: Spray treating OHP for use with KM73 plates

Re: Spray treating OHP for use with KM73 plates

  • To: alt-photo-process-l@usask.ca
  • Subject: Re: Spray treating OHP for use with KM73 plates
  • From: SusanV <susanvoss3@gmail.com>
  • Date: Wed, 14 Mar 2007 17:12:50 -0400
  • Comments: "alt-photo-process mailing list"
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WOW is that cool or what?  Thanks, Jon for testing all those things!

I had some success with my "foamcore window" technique initially, but
then mixed results since then.  I'll be getting some Krylon tomorrow
and trying that!!!!


On 3/14/07, Jon Lybrook <jon@terabear.com> wrote:
Hi All,

I tested about 6 different spray products to try and come up with a good
alternative to using baby powder with Pictorico OHP and the KM73
Printtight plates to mitigate air pockets and light patches in the image
when using a vacuum frame.  Thanks very much Susan Voss for the idea!

What I found was 2 light passes with Krylon Crystal Clear Acrylic
Coating 1303 (it's glossy and perm) on Pictorico OHP (normal, not Ultra
which I haven't tested) provides enough texture to avoid having to use
baby powder.  It adds just about 1% density on average to the Pictorico
compared with 4% or more from other products and doesn't seem to
introduce any noticeable mottling to the final print.  Just make sure
there's no dust on the positive before you treat it, and allow it to dry
in a dust-free area, or whatever lands on it will be stuck to it
forever, of course.

I also tried Krylon Crystal Clear Matte, Rustoleum satin clear finish,
Krylon Workable Fixatif, and a Shuregarde product just for kicks (UV
inhibiting lacquer -- duh).  Didn't try any hairspray products, though
that could be something to try too (thanks Jan).

Hope that helps.  If anyone else decides to try the Krylon Crystal Clear
1303, or has better results with something else, be sure to post it.


gravure blog at www.susanvossgravures.blogspot.com
website www.dalyvoss.com