I am sending this post on behalf of the student who
brought in samples of the TechniCloth.
Here's a reply to the clean room wipes question...
I'm a hack when it comes to PPL, but I try to apply
some of my spacecraft experience when I can. When I
recommended the TechniCloth wipes, I assumed
they were for general press cleaning. I think they
would be good for cleaning of the bed, ways,
cylinders, etc., without generating many particles. I
didn't realize that what my classmates were looking
for was a wipe that could be used to clean
photopolymer plates. For this, I wouldn't
recommend the TechniCloth, but rather a 100% polyester
double-knit wipe that we use in our Class 100 clean
rooms: Alpha 10 Wipers. These wipes,
while less absorbent, will not shed particles even
when brushed against the relief surfaces of the
photopolymer plate. We tend to use these even if we
are in Class 100,000 clean rooms. But it looks like
they can be expensive, so I'll look to see if
there is some middle ground that is better than the
TechniCloth, but less expensive than the Alpha 10.
Here's the link to Alpha 10 wipes:
--- Gerald Lange <bieler@...
> One of my students brought samples of these in and
> another found this
> supplier link
> One of the problems I have been looking for a way
> around is the
> accumulation of "matter" in the shallow relief of
> photopolymer plates.
> Especially when working with halftones or highly
> exposed line work
> where the "matter" can, during sustained edition
> runs, gradually build
> up and become part of the printed image. Sometimes a
> nice effect, but
> not if you are trying to avoid it. While paper lint
> and ink contribute
> to this, so can cleaning materials. I normally use
> tight weave
> surgical sheeting on typographic surfaces but these
> lintless cloths
> look like they will work even better. Hey, JPL uses
> this stuff!
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