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450RE: [PPLetterpress] Re: halftone screens

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  • Marnie Powers-Torrey
    Mar 15, 2002
    • 0 Attachment
      Perhaps I'm not understanding the question here. It seems that if you
      are producing a negative in a process camera with a halftone screen, the
      sandwich below the lens would include the halftone screen emulsion down
      on top of the film that you exposing emulsion up. Thus, if you expose
      the film to the image right reading, you've produced a right reading
      emulsion side up negative. Ready to expose to a plate for letterpress?
      Or did I misunderstand the process?

      Marnie

      -----Original Message-----
      From: Gerald Lange [mailto:bieler@...]
      Sent: Wednesday, March 13, 2002 4:00 AM
      To: PPLetterpress@yahoogroups.com
      Subject: [PPLetterpress] Re: halftone screens


      [forwarded message to membership]

      Frances & Nicolas wrote:
      >
      > Dear Gerald
      >
      > ....I should say that I differ from you in that I output from computer
      a good
      > quality laser-printed version from which I make my negative using a
      > process camera.[I do this partly because I use a lot of curious
      artwork
      > and so on but, mainly I think, because I so much like being
      > self-contained . . . being able to go from writing a poem and drawing
      an
      > image to printed version within the day and without needing to leave
      the
      > premises!] Presumably your halftone screen is added magically at 'the
      > Bureau'. For me, I assume that I get an appropriate screen from
      somewhere
      > (helpful advice about screen density in your book) and I, in some way,
      > introduce it in between the lens and the film emulsion. Is this
      basically
      > correct?
      >
      > Logic shows me a problem here, though, because I am 'shooting through
      the
      > back' of the film as appropriate for letterpress. If the screen film
      is
      > on the glass with its emulsion up, it is nevertheless going to contact
      > the BACK of the receiving film, for its emulsion is on the top. I fear
      > that the thickness of the film might be enough to distort the dots or
      > introduce parallax problems or something.
      >
      > When I am talking about haltone plates, I am talking more about
      > reproducing a wash-drawing or somesuch rather than a photograph - but
      I
      > suppose technically it is all of a piece.
      >
      > Sorry to have gone on so but any help (from you or the troops 'out
      > there') would be much appreciated!
      >
      > All good wishes
      > Nicolas
      >
      > The Old Stile Press
      > Catchmays Court
      > Llandogo, Monmouth NP25 4TN UK
      > phone & fax 01291 689226
      > oldstile@...



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