Re: Plate output quality
- --- In PPLetterpress@yahoogroups.com, "Robert E Blesse" <blesse@...>
>outputting two kinds of film, a matte-based and glossy.
> Thanks, Gerald. I called them and was told that they are now
Some plates require matte film, others do not.
The Rigilon HX I use has a matte suface on the plate, works with
smooth film; Miraclon MS wants matte film. If both film and plate have
a smooth surface, they can stick together and trap air leading to bad
contact, which will cause filling and indistinct edges.
If your exposure unit has a flexible cover you can improve contact
with roller or burnisher. But in a glass contact frame that can't be
done, and if you don't trim the edges of the plate material cleanly,
there may be a ridge that acts like a gasket, trapping air.
--Eric Holub, SF