RE: VIGC study on spectrophotometers
RE: VIGC study on spectrophotometers
- Subject: RE: VIGC study on spectrophotometers
- From: "Lorenzo Ridolfi" <email@hidden>
- Date: Wed, 17 Sep 2008 10:11:34 -0300
Hi Paul,
I have an Eye-One Pro and an Eye-One Isis. These instruments have different
light sources and I got 4 delta-e difference between the 100% Cyan and 100%
Magenta patches in an Epson 4880 emulating FOGRA39 reference data.
Looking at the spectral curves, you'll see the difference is concentrated in
wavelengths below 420nm
(http://www.colorpixel.com.br/tmp/eye_one_versus_isis.jpg). My conclusion:
the different light sources in the instruments are interacting with the
optical brighteners in the paper (or in the inks) and are causing this
measurement difference.
Do you know if the test from VIGC was made in a substrate/inks with OB?
Best regards,
Lorenzo
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