Discussion: View Thread

G7 colorspace on HP Indigo

  • 1.  G7 colorspace on HP Indigo

    Posted 08-20-2019 05:32 PM
    I want to do G7 color space on HP Indigo. It is label stock. As CRPC were derived for offset then should it be used for other processes like Indigo & Flexo? HP has different LAB values for CMYK so they won't match to offset CRPC. I have following doubts.
    1) Can I do custom colorspace?
    2) Do I need to use SCCA? 
    3) What will be my tolerances as I couldn't found tolerances for Indigo?
    4) If I do G7 color space for proofing then should I target same Indigo color space as source or Gracol 2013 is ok? I.e. for getting G7 color space should I both Indigo & Epson match the same color space? 
    Awadhoot


    ------------------------------
    Awadhoot Shendye G7 Expert
    (269) 626-4646
    ------------------------------


  • 2.  RE: G7 colorspace on HP Indigo

    Posted 8 days ago
    Edited by Johnson Patilano 8 days ago
    Hi Awadhoot,

    Just curious how you proceeded with your calibration.

    If the intent is to maximize the color gamut of HP Indigo, curving and updating the job LUT using P2P to achieve G7 Grayscale should be the way to go. In setting-up your proofing system (i.e. Epson), you may derive your own HP Indigo characterization data set by printing TC1617x and then the resulting measurements will now be your custom reference print condition that you can use as aim for the proofing system. As long as your Epson's color gamut is wider, this should do the trick.


    ------------------------------
    Johnson Patilano
    Quality Manager
    Vistaprint - Australia
    Deer Park VIC
    +61439112392
    ------------------------------



  • 3.  RE: G7 colorspace on HP Indigo

    Posted 7 days ago
    Awadhoot,

    There is nothing wrong with using a curves-only approach to the Indigo; it will always improve the output. Color Space is a different matter. You may or may not get there with curves alone (I suspect you won't), and would have to profile the Indigo and target the intended aim, e.g., GRACoL2013. Assuming that the profiled Indigo can achieve a good match to the target, you can safely aim your inkjet proof at that target too. I would not use the Indigo itself as a reference for proofs unless a standard reference profile was not a possible match, e.g., when printing with the extra Indichrome inks or on unusually colored substrates. In either case, you'll have to profile the press, and you're in for extra work, such as averaging, smoothing, and cleaning up the measurement data--the usual complications in press profiling only more so, as the Indigos are inherently not very stable. It might be well to consider whether the specific application and customers make this necessary. Does your Indigo really have to match GRACoL2013?

    ------------------------------
    Mike Strickler
    MSP Graphic Services
    ------------------------------



  • 4.  RE: G7 colorspace on HP Indigo

    Posted 6 days ago
    Awadhoot,

    I am a Color Specialist with HP Indigo NA, I'd love to answer your questions directly. We have many customers who are able to achieve G7 condition. Please reach out to me and we can arrange a call to assist you.

    John Dettmer
    Color Specialist
    HP Indigo AMS
    Materials and Application Team

    jp.dettmer@...
    M +1 585 831 6530

    Idealliance G7 Certified Expert
    Idealliance CMP Master 



      



    ------------------------------
    John Dettmer G7 Expert
    Digital Systems Technolgist
    Hewlett-Packard Indigo
    Scottsville NY
    (585) 208-3640
    ------------------------------