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  • 1.  X-rite Exact readings compared to visual represntation

    Posted 9 days ago

    I'm using my Exact Advanced spectrophotometer (with a Pantone library loaded) to color match some spot colors. The color that measures closest to my target (PMS 438) measures a delta of 0.8 but visually is pretty far off. See attached photo.  Heck, even when I use the book's patch as a measured reference, that patch still reads around 1.5.

    In the end, I know we want to select what looks the best, I get it. But I need to understand why it's visually so different. Can anyone here explain why the 2 patches look so different even though they measure nearly identical LAB values?  (Yes, I've looked at them under different lighting conditions as well.)



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    Brian Tickenoff
    PrePress Manager
    Coyle Reproductions Inc.
    Brea CA
    (866) 269-5373
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  • 2.  RE: X-rite Exact readings compared to visual represntation

    Posted 5 days ago

    I have an exact as well when I can get it updated I will test that as well.

    Benson Franklin Faux

    ベン・フランクリン・フェイク

    Senior Engineer

    S&SS. Software & Strategic Solutions

    SME Industrial Print and Advanced Finishing

    Education Team – Lead Curriculum Developer

    G7 Expert - Color Management Master - Fiery Cut sheet and SAG Expert

    Former HS Photo, TV Production, Graphic Communications Teacher (CTE)

    Former AZ State Curriculum Developer(CTE)

    RICOH - USA                                                    

    Upstate NY/Northeast United States

    Corporate Cell: 315-373-9619

    Personal Cell: 315-236-5822

    Benson.faux@...



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    Benson Faux
    Ricoh USA, Inc.
    Central Square NY
    (315) 373-9619
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    Original Message


  • 3.  RE: X-rite Exact readings compared to visual represntation

    Posted 4 days ago

    What dE formula are you using? I would suggest using dE 2000 if you're not already as  it's more "visual" based rather than using pure mathematical differences like dE(1976).
    dE2000 tends to put more emphasis on hue angle and L* rather than Chroma since we tend to me more sensitive to hue shifts than chroma shifts.



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    Terence Wyse
    Senior Color Specialist
    Shutterfly
    Fort Mill SC
    (704) 207-4054
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    Original Message