Message
Re: [colorvision_group] Re: PFP+PSCS2+Canon i9950=yellow cast in prints
2006-04-13 by CDTobie@aol.com
In a message dated 4/12/06 6:12:22 PM, stephanellmerich@... writes:
Today I used the calibration tool in PFP (black/white) and then
measured the white patch and it reads it as grey-ish not white. Is this
normal?
If you mean you measured the white tile, and it wasn't perfectly white, that is indeed perfectly normal. The white tiles shipping with hundred thousand dollar laboratory spectros aren't white either. Any tile that would measure white would have so many other issues (whiteners, fluorescence, non-neutrality, spikey spectra, you name it) that it would be more trouble than it was worth.
Also the colours on the printed target are closer to what I see on the
screen (calibrated with the spider) than the colours read by the
spectro...
Don't put too much stock in this measured patch/what you see on screen relationship. The patches are sent to the screen as raw RGB values, there is no intention that they will match anything, only that they will indicate relative values to keep you place in measuring a target. Besides, many if not most, of the patches are out of either the gamut of the monitor, or that of the printer, so would not be a match even under fully color managed conditions.
C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com