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13650Re: [PPLetterpress] Recent Adobe issue and PPL

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  • parallel_imp
    Dec 11, 2013

      <Determining how to spread or choke two separations that touch each other is difficult>

      In predigital photomechanical days it was a easy rule: you spread the lighter color into the darker color; how much of a spread depended on intended press and stock. It was just simple darkroom work with contact film and diffusers based on experience with the result in the pressroom. But back then, nobody in his right mind would have printed a halftone on blotter paper, unless it was C-1S blotter and the printing was kissed on the coated side, unlike today. Different times, different morals, and formulae have been replaced with algorithms.

      --Eric Holub, SF

      (my latest shop motto: Obsolete In Every Way)

      ---In PPLetterpress@yahoogroups.com, <harold@...> wrote:

      Identification of separations (whether spot or process) is simple. 

      Determining how to spread or choke two separations that touch each other is difficult. Determining how to spread or choke two or more separations that touch each other with halftones is extremely difficult. The number crunching behind this has traditionally been done (and presumably patented) by prepress software vendors. None has open sourced their work to my knowledge. 

      The developers of Ghostscript have identified "In-RIP trapping" as an area in need of developers. They don't expect anyone to step up to the plate at this point. But, if you're a math genius with time on your hands by all means have at it!


      On Mon, Dec 9, 2013 at 12:03 PM, Michael Metz <mtmetz@...> wrote:
      Harold, Gerald, Michael et. al,

      Does one need to identify spot colors to create binary plates?


      From: Michael Hurley <mephit@...>
      To: PPLetterpress@yahoogroups.com
      Sent: Sunday, December 8, 2013 2:51 PM

      Subject: Re: [PPLetterpress] Recent Adobe issue and PPL

      On Dec 8, 2013, at 1:15 PM, Harold Kyle wrote:

      > Unless you were writing in TeX or raw Postscript, I doubt the non-cloud design software on your hard drive is yours anyway. Meaning, for instance, Adobe owns it and has granted you license to use it in a specific manner. Adobe will likely try to make whatever tool you bought obsolete by changing their proprietary formats anyways. Until there's a community of print designers making and freely sharing their design tools (as has happened with web design for instance) there is no way out of this cycle of dependance.

      I think Adobe have finally pushed their position too hard. Before, there were at least semi-viable competing titles. These days, Quark's capabilities have fallen so far behind InDesign's capabilities they really aren't comparable software anymore. There are so many people so pissed at Adobe for this kind of thing that I think it's inevitable that there will be some new competition soon.

      > Print still has a ways to go before it has open source tools that could compete with Adobe's. Boxcar had started to build its own print output software based on Ghostscript last year (results of which are on our website as the platemaking plate preview) but was unable to make a standalone RIP because there was no FOSS trapping library for spot colors...that I could find anyway.

      Yes, spots are the problem. All the libraries are privately owned by for-profit entities and must be licensed. This is the problem Scribus has.
      Michael Hurley Titivilus Press
      123 North Holmes St. titiviluspress@...
      Memphis, TN 38111 (901) 831-7640

      Boxcar Press
      509 W. Fayette St. #135
      Syracuse, NY  13204
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