[argyllcms] Determining paper color from a profile?
- From: Ben Goren <ben@xxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 2 Feb 2010 17:53:12 -0700
Is it safe to assume that the wtpt tag of an ICC profile is the actual paper
color?
I ask because the profile here:
http://www.museofineart.com/files/MuseoMAX_Canon%20iPF%20x100%20(FineArtWCP_HighestQ).icm
has a wtpt tag of X=0.899, Y=0.933, Z=0.751. According to Bruce Lindbloom's
calculator, that's equivalent to D50 L=93.1, a=18.0, b=-5.6...and that seems
awfully pinkish for a paper. I mean, really, really pinkish.
An Argyll-made profile of Red River Premium Matte paper, on the other hand, has
a wtpt tag of X=0.859, Y=0.896, Z=0.849. According to Bruce, that's L=95.8,
a=-0.920, b=-9.09. According to spotread from a sheet from a different batch
from what I used to make the profile, the paper measures X=86, Y=89, Z=78 or
L=95, a=1.6, b=-4.2. Not exactly the same, but certainly in the same ballpark.
And it looks about right when I fill the screen with those values in Photoshop.
So...is the Crane Museo Max paper really that pinkish? Or is their profile
somehow b0rked? Or...?
Cheers,
b&
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