Loading ...
Sorry, an error occurred while loading the content.

306RE: [PPLetterpress] Re: another possible factor in exposing plate s

Expand Messages
  • Brian Molanphy
    Jan 9, 2002
      katie,

      i get this from info sheet from our plate supplier, gene becker: 'our
      plates... will hold a 3% dot on a 150 line screen.'

      brian

      > ----------
      > From: Katie Harper
      > Reply To: PPLetterpress@yahoogroups.com
      > Sent: Wednesday, January 9, 2002 8:40 PM
      > To: PPLetterpress@yahoogroups.com
      > Subject: Re: [PPLetterpress] Re: another possible factor in exposing
      > plate s
      >
      > Brian: I guess I don't quite get what you are saying about the "limit of
      > about 150 lpi or 300 dpi"... is this something you have read somewhere,
      > some
      > kind of specification? I'm sure that photopolymer probably does have a
      > limit
      > as to how small a speck it can hold (ie, how fine a halftone dot), but I'm
      > pretty sure it is capable of holding much finer detail than most
      > letterpresses can print, so the limitation you speak of is not from the
      > plate but from the press. In any case, I cannot see how a polymer plate
      > can
      > be limited by 300 dpi, since the plate is analog and the term "dpi" refers
      > to the digital world.
      >
      > And yes, the difference between output from a 600 dpi output device and a
      > 1200 dpi or larger resolution output device will show, but whether or not
      > that difference matters depends on a)what you are printing, b)what you are
      > printing on, c) what press you are using and d) what ink. There are
      > probably
      > other factors including temperature, roller condition, what the printer
      > has
      > for breakfast, and on and on... But it mainly depends on what is
      > acceptable
      > quality for the printer or the client. What works for a daily newspaper
      > won't be considered acceptable for a slick magazine or a coffee table book
      > printed in Italy. One plate may look like royal doo-doo on one type of
      > paper
      > and swell on another. For my own work, I tend to try to get the best
      > possible image from a plate, so that all the other factors which will
      > whittle down the quality have to start from a higher place. Having said
      > that, I will add there are times when a home-made neg will work and times
      > when it won't. Just as there are times when taking an exposed piece of
      > film
      > and scratching a drawing on it will make a great negative, and times when
      > I
      > need a careful rendering of an original or a computer file. I'm talking
      > images here. With type, I take no chances and get the best quality output
      > and plates I can.
      >
      > Katie Harper
      > Ars Brevis Press
      > Cincinnati, OH
      > 513-233-9588
      >
      > Remember: Book arts will save the world!
      >
      >
      >
      > > From: Brian Molanphy <bmolanphy@...>
      > > Reply-To: PPLetterpress@yahoogroups.com
      > > Date: Wed, 9 Jan 2002 20:12:22 -0700
      > > To: "'PPLetterpress@yahoogroups.com'" <PPLetterpress@yahoogroups.com>
      > > Subject: RE: [PPLetterpress] Re: another possible factor in exposing
      > plate s
      > >
      > > katie wrote, in part:
      > >
      > > 'If you render an 85-line halftone on a 300 dpi
      > >> printer and compare it to an 85-line halftone rendered on a 1200 dpi
      > >> printer, the 1200 dpi printer output will appear sharper, crisper and
      > with
      > >> better tonal rendition. If you look at both through a magnifier, you
      > will
      > >> see that the dots are the same size, but the 1200 dpi dot is finer and
      > >> crisper.'
      > >>
      > > i get this, basically. but if polymer plates have a 'limit' of about
      > > 150 lpi or 300 dpi, what use is the 1200 dpi file ? the file, or the
      > > laserprint, may have more detail, but will that detail show up on a
      > polymer
      > > plate? this question may be more meaniful if, for example, one is
      > committing
      > > the heresy that i do, which is to generate negatives on my 600 dpi laser
      > > printer.
      > >
      > > brian
      > >
      > >
      > > To post a message to the membership, send an email to
      > > PPLetterpress@yahoogroups.com
      > >
      > > To log on to the groupsite (confirmed Yahoo ID required), go to
      > > http://groups.yahoogroups.com/group/PPLetterpress
      > > [copious reference sources can be found onsite in Bookmarks (URLs),
      > > Database (tables), Files (documents), and Messages (archives)]
      > >
      > > Encountering problems? send an email to
      > > PPLetterpress-owner@yahoogroups.com
      > >
      > > To unsubscribe, send an email to
      > > PPLetterpress-unsubscribe@yahoogroups.com
      > >
      > >
      > >
      > > Your use of Yahoo! Groups is subject to
      > http://docs.yahoo.com/info/terms/
      > >
      > >
      >
      >
      >
      > To post a message to the membership, send an email to
      > PPLetterpress@yahoogroups.com
      >
      > To log on to the groupsite (confirmed Yahoo ID required), go to
      > http://groups.yahoogroups.com/group/PPLetterpress
      > [copious reference sources can be found onsite in Bookmarks (URLs),
      > Database (tables), Files (documents), and Messages (archives)]
      >
      > Encountering problems? send an email to
      > PPLetterpress-owner@yahoogroups.com
      >
      > To unsubscribe, send an email to
      > PPLetterpress-unsubscribe@yahoogroups.com
      >
      >
      >
      > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
      >
      >
    • Show all 7 messages in this topic