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Re: [PPLetterpress]

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  • Regis Graden
    Roderick, It is my opinion that in this case the darker color should go down last. The trap may not show at all. Sometimes the printer gets lucky! Regis ...
    Message 1 of 1 , May 1 10:28 AM
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      Roderick,

      It is my opinion that in this case the darker color should go down last. The
      trap may not show at all. Sometimes the printer gets lucky!

      Regis
      ----- Original Message -----
      From: "Roderick" <rxchow@...>
      To: <PPLetterpress@yahoogroups.com>
      Sent: Saturday, May 01, 2004 9:33 AM
      Subject: Re: [PPLetterpress]


      Michael (et al):

      I'm printing black and burgandy for one set and black
      and goldenrod for another set. If I place black down
      first, then burgandy (goldenrod) will trapping at 1/2
      (assuming I'm registered) show all that much. Should
      the client decide how much trapping I need? I'm
      assuming not because I'm printing and not him, I need
      to decide is how much overhang is acceptable to me. Am
      I correct?

      I've printed a few two color jobs with colors in no
      particular order and never specified trapping because
      I just registered. Should I be putting down the
      lighter color first then black or vice-versa?

      Many thanks, Roderick


      --- Michael Barnes <mjbarnes@...> wrote:
      > Traps in offset printing are frequently .25 point
      > (quarter point).
      > Unless black is overprinting, a colour trapping
      > under black can be
      > considerably more (half a point) since it won't show
      > much. Nowadays we
      > trap even less -- around .125 pt -- because we are
      > imaging to direct to
      > plate, which has improved registration.
      >
      > Of course I don't know if numbers that work in
      > offset also work for
      > letterpress. But a 2 pt trap is certainly big. Many
      > rules and text
      > characters are themselves thinner, or not much
      > broader than this, and
      > if the trap is coming in from all directions, such a
      > large number will
      > effectively result in an overprint.
      >
      > Michael Barnes
      >
      >





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