Re: Tacky attraction< (was Solarplate images...website)

[SusanV <susanvoss3@gmail.com>]

Hi Mark,

Maybe.

This polymer feels kind of gummy... (like those little gummy bear
candies I find in my son's pockets, all covered in lint.)  Might be
that heat would make them even more tacky.... BUT if that turned out
to be true, then maybe cooling prior to exposure would help.  Couldn't
allow condensate to form though... these things are water soluble!

thanks for the idea, mark.

susan

On 2/26/07, Ender100@aol.com <Ender100@aol.com> wrote:
> Susan,
>
>  Bunch of good ideas there.... would a hair dryer on the plate and emulsion
> side of the positive just before putting them together and rolling out the
> bubbles help reduce some of the tackiness?
>
>  Best Wishes,
>  Mark Nelson
>
>  Precision Digital Negatives - The System
>  PDNPrint Forum at Yahoo Groups
>  www.MarkINelsonPhoto.com
>
>  In a message dated 2/26/07 8:14:47 PM, susanvoss3@gmail.com writes:
>
>
>
> So the leprositic measles we're getting in our gravure prints may be
>  from the tackiness of the KM73 plate surface against the inked side of
>  the OHP film.  Talcum powder helped but didn't solve my problem.  So
>  now I wonder how we combat this tacky issue?
>
>  We need to allow the trapped air to move to the outside edge of the
>  plate/ohp sandwich, so the vacuum can pull it out.
>
>  I'm just brainstorming here...
>
>  corn starch (maybe it's better in some way than powders which have
>  other additives)
>
>  some wet type of lubricant?  can't use water of course, but what about
>  oil?  would a light oil film dissolve the inkjet ink?  Would it wash
>  off the polymer plate easily during development?  I could imagine
>  using a brayer to bring the ohp in firm contact with the plate before
>  exposing... working from the inside out to push air pockets to the
>  edges.
>
>  Using the brayer idea through Krene plastic during drawdown to help
>  push the air bubbles to the edges of the plate where they could
>  escape.
>
>  is there some type of thin film we could add to the sandwich, in the
>  middle... nah, that sounds like a newton ring nightmare...
>
>  one more thing... what if we expose the positive with the printed side
>  UP away from the plate?  Is the opposite side of the ohp as tacky?
>  Would it make an unacceptable difference in image sharpness?
>
>  susan, frustrated.
>
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--
susan
gravure blog at www.susanvossgravures.blogspot.com
website www.dalyvoss.com