Re: Polymer Plate 80% screen Weirdness

From: Jon Lybrook ^lt;[email protected]>
Date: 02/16/04-01:56:35 AM Z
Message-id: <>

Thanks for your input Mark. Not sure how the pebbling up against the back
of the plate would do anything to affect the film on top, but who knows?
I'm wondering if the pebbling on the frame vacuum hasn't somehow affected
the screen in areas where the two came in direct contact with one another.

I've read on Strange Ross' site he uses a dusting of talc on the plate to
remove air bubbles. I may try that and/or call Peter at Alpha Graphics
and see what he thinks. I will let the list know how it goes.


On Sun, 15 Feb 2004 wrote:

> could it be from the pebbled surface of the vacuum frame making contact on
> the underside of the plate and causing an uneven pressure, thus little ripples?
> Mark Nelson
> In a message dated 2/15/04 6:50:55 PM, writes:
> > Thanks Christina,
> >
> > I'm using a screen made at Alpha Graphics and am using Pictorico OHP
> > transparencies.  I am using a frame vacuum.  If I watch the exposure of
> > the screen, I do see some bips (my own term) in the surface of the film
> > from the pressure, but it's otherwise smooth.  I don't know what could be
> > causing the little indentations.  The screen also comes off the frame
> > vacuum perfectly smooth too (no kinks or bips -- they only exist during
> > the exposure).
> >
> > Jon
> >
Received on Mon Feb 16 01:56:43 2004

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