Digital BW, The Print

> From: John Moody <moodymz3@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Tue, 4 Oct 2005 07:05:14 -0400
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: RE: [Digital BW] more colorbase misc.
> 
> I'll would hope the Epson profiles were made with way more patches than the
> IT9.18 chart.  

Maybe but I suspect not.  Even PM5 uses the same number of patches as the
Eye-One Photo for printers.  918 of them.

(Check them out.  BTW I have rejigged my Eye-One Photo to use the PM5
display patches for display calibration.  I have not been able to do the
same for the printer profiling but I suspect the actual profiling software
for the EyeOne and PM5 is the same or extremely similar. EyeOne simply
doesn't have the other modules, eg editing, yet.)




>Colorbase allows you to calibrate your printer to work with
> those Epson profiles; that is useful.
> If you create a profile for third party paper using a large target (2500+
> patches) Colorbase will keep the printer in calibration without redoing the
> large targets; that is useful.

Only insofar as the calibration is accurate - back to your patch count
thing.  But I agree that 264 is a reasonable number of patches, 33 per ink,
for linearisation although I use 51 for QTR.

> It remains to be seen, but the gamut may not be chopped off as much as the
> typical difference between color controls and no-color-adjustment when
> creating a custom profile; that would be useful.
> But, as you say, Roy's tools make Colorbase essentially useless for BW.


I can't get the 4800 Mac version to work.  But I took a look at the
calibration chart in GM's Colorlab and agree that it is a linearisation test
chart rather than an RGB test chart.  I can't yet use the software.  IS it
printed from Colorbase, ie is Colorbase the driver, and is operating in true
CcMmYKklk fashion?  Would seem so from the chart...


I'm going to flip this conversation back to the WF list ... Even if it is
painfully slow to post on.