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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.

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Brian Tickenoff
PrePress Manager
Coyle Reproductions Inc.
Brea CA
(866) 269-5373
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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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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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