Message
Re: [colorvision_group] High quality target for CD/DVD printing
2008-08-14 by CDTobie@aol.com
In a message dated 8/13/08 10:59:23 PM, abaymajr@... writes:
I'd like to inform people that I managed to put those 225 patches along 4 CD surface targets, and that I would be glad to share them with anyone who might be interested in (please, contact me privately). Regarding to the 225-patch generated profile, it didn't solve the problem I reported on previous message, so I had to investigate further. I found an inconsistency with the drivers for the Canon IP4300 (at least those brazilian/portuguese ones). Unlike it occurs when I select matte or professional papers on printing configuration panel, the drivers ignore the profile chose as default on the Vista color management panel (necessary to apply a given profile to printing jobs made by non-native color profiling support applications) when the printer is configured to None as Color Correction and media type is "Normal paper" or "Printable disc". Someone may argue that this should be the expected behavior.
I don't believe anyone will argue that its ideal behavior, but unfortunately is expected behavior...
It might be, but the fact is that the drivers behave differently with other kind of selected media types. I had reprinted the targets for normal paper and CD surface using the Manual/ICM option. The result was a totally beautiful printing, with correct blues and an adequate saturation for what it should be expected for normal papers and disc surfaces --
Glad to hear that your disc profiles are doing their job, we don't get a lot of feedback on that feature.
although it seems, by comparison, Windows Vista color management only considers perceptual rendering, despite of all kind of settings combinations I have tried on color management panel.
If you want intent control, I'd recommend printing your discs out of Photoshop...
One question remains: what's the mininum printed size for a patch to be still correct readable by a well-centered Datacolor spectrophotometer? I would like to construct a 729 patch set of targets for CD profiling, feasable along 6 or a maximum of 7 discs, or to implement the grey target into the same quantity of disc targets.
The outside diameter of the nosecone is about 9mm, the inside diameter of it (the illuminated area) is about 7mm. The measured diameter within the illuminated area is about 5mm. But you really need to have the whole 7mm the same color, or translucency effects can effect the result (thats what the overillumination is for in the first place). Besides, you would have to be omniscent to know how to place the nosecone on a patch any smaller than 9mm. So, in a practical sense, tightly placed 9mm square patches could be read, with care and patience.
C. David Tobie
WW Product Technology Manager
Digital Imaging & Home Theater
Datacolor
CDTobie@...
www.datacolor.com/Spyder3
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