Message
Re: [colorvision_group] Re: good prints, bad soft proof
2008-01-20 by CDTobie@aol.com
In a message dated 1/20/08 11:36:06 AM, jeanchristophe.marie@... writes:
Thank you for your answers. I will try with white and black
compensation newt week-end (not at home this week). It is matte paper...
I don't have photoshop but Qimage. The chart is printed with Qimage
then measured with PrintFix Pro (I wil update, Ididn't know that I
could upgrade. Thanks colorvision!).
When I say that white becomes blue on soft proof, it is in Qimage.
Turning on black compensation in Qimage doesn't change anything. I've
never soft proofed in PFP.
Whites turning blue indicate that you are using an artificially whitened paper. Checking the checkbox in Ref White should solve that. Checking the checkbox in Ref Black should reduce your "grayveil" effect as well, especially on matte papers.
What I don't understand with the blue cast:
- when I calibrate the spectrocolorimeter with the paper, all the
patch are as I see them on the paper. That is, I think, a ggod thing...
No, that is a major error, and will cause inaccuraccy. Never calibrate on the paper, only on the white tile...
- when I calibrate it on the calibration base, all white colors are
blue. This is quite different from what I see on the paper! And I
should see on the screen what is on the paper during the measurement.
If the whitepatch (paperwhite) of your target measurements (after calibrating on the white tile!) is showing up as a bright Cyan, instead of white, that is hardware issue, and you will need to contact support at ColorVision.com to get your spectro replaced. But first, clean the whitetile with rubbing alcohol and a paper towel (don't use cloth, it may have whiteners in it). See if white then measures as white; if its still bright Cyan, then contact support for a replacement.
C. David Tobie
Product Technology Manager
Digital Imaging & Home Theater
Datacolor Inc.
CDTobie@...
www.datacolor.com/spyder3
**************
Start the year off right. Easy ways to stay in shape.
http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489