Just for the fun of it I read my trusty Kodak gray card with my color mouse and, as one might guess, it's accurately middle gray but not a neutral gray mine showed itself to have a red cast. the numbers were 123, 114, 113 admittedly, my card is several years old, but I now know it is still trustworthy for using with my spot meter. J.Z.
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RE: Are Kodak gray cards calibrated?
2004-06-21 by Jon Zax