Re: Spectrophotometer's Illuminant and Angle Affect
Re: Spectrophotometer's Illuminant and Angle Affect
- Subject: Re: Spectrophotometer's Illuminant and Angle Affect
- From: Robin Myers <email@hidden>
- Date: Thu, 20 Jul 2006 18:20:16 -0700
On Jul 20, 2006, at 1:10 PM, email@hidden wrote:
<snip>
It lead me to do some more research after which we changed our
Data Color to D50 2 degrees and set it to
specular excluded.
I then measured PMS 186 in our 2006 Pantone formula guide in 5
different places using both the i1 and the Data Color. I
averaged the 5 readings for each and then compared them. Their
difference is 2.8 dE.
I was hoping to see them closer as I am sure none of our customers
have a Data Color spectro and we already have
customers that claim our color is not correct because our numbers
do not match theirs.
Actually, this is a very good value, as noted by other posters. The
specifications for the Eye-One state an average inter-instrument
agreement dE94 of 0.4, which roughly equates to a dE76 of 0.8.
Considering that you are comparing instruments from different
manufacturers, and that specular excluded sphere measurements are
only approximately equivalent to 45/0 readings, a 2.8 dE76 is very
acceptable.
Regards,
Robin Myers
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