Datacolor User to User Support Group.

>>As far as I am aware PrintFix is not a substitute for printer 
calibration.
Neither is ColorBase
is substitute for printer profiling.

Both valid statements... but is ColorBase actually printer calibration? 
In the fundimental sense that is...

>>ColorBase is used for printer and profile
optimum
performance, either on a single printer or as you mention equalising 
several
printers and
using same profiles on all. Bellow is a citation from Rob Galbraith 
site:

"Get better results from the ICC profiles included with the printer. 
Since the
goal of
ColorBase is to make the colour of your printer match that of the 
printer Epson
used to
create the bundled profiles, prints made through those profiles should 
have more
accurate
colour. Or at least colour that's much closer to what Epson was 
intending when
the
profiles were created.

This quote referrs to buildind a canned profile, and using ColorBase to 
attempt to bring a specific printer to a state where that generic 
profile will better represent it. ColorBase would certainly help there. 
But one can use the same spectro used for that purpose with ColorBase, 
to straightforwardly bring the printer to a more accurate state by 
profiling it instead. I have seen no evidence of "ColorBasing" a 
printer making it better with custom profiles, only with canned ones. I 
would agree, on the other hand, that linearizing a RIP, or choosing the 
most appropriate media setting for an RGB driver will indeed produce a 
better result, even with a custom profile, so if ColorBase's 
capabilities run to that level of sophistocation, they may well worth 
bothering with even for use with custom profiles. That would be quite 
exciting, bringing one more feature of RIPs to a RIPless RGB workflow. 
I suspect, however, that they offer simple channel adjustments whose 
overall effect on total ink densities is similar to changing the 
default settings in the Density control.

C. David Tobie
Product Technology Manager
ColorVision, Inc.
CDTobie@...
www.colorvision.com

-----Original Message-----
From: WhoCares <ghibliii@...>
To: colorvision_group@yahoogroups.com
Sent: Sat, 13 Oct 2007 4:42 pm
Subject: [colorvision_group] Re: Epson ColourBase






As far as I am aware PrintFix is not a substitute for printer 
calibration.
Neither is ColorBase
is substitute for printer profiling. ColorBase is used for printer and 
profile
optimum
performance, either on a single printer or as you mention equalising 
several
printers and
using same profiles on all. Bellow is a citation from Rob Galbraith 
site:

"Get better results from the ICC profiles included with the printer. 
Since the
goal of
ColorBase is to make the colour of your printer match that of the 
printer Epson
used to
create the bundled profiles, prints made through those profiles should 
have more
accurate
colour. Or at least colour that's much closer to what Epson was 
intending when
the
profiles were created.

By being able to return a printer's colour output to a known state, 
even when
swapping in
new ink cartridges or paper (of the same type but from a different 
media lot),
it may not
be necessary to generate a new custom profile as frequently. Instead, 
ColorBase
can be
used to bring the printer back to a state that closely resembles when 
the custom
profile
was made, by accounting for colour differences resulting from the new 
ink or
media lot,
changes in temperature and humidity, a shift in printer output after it 
has been

transported and more."


ColorBase does not discriminate against third party profiles and 
printer
optimisation apply
regardless of profiles source.  If PrintFix profiles are created after 
printer
calibration with
ColorBase that means subsequent calibrations will bring the printer in 
the same
performing state as it was before profiling with PrintFix. This is 
confirmed by
Michael
Reichmann experience posted on his site. To quote,

"So, if the Pro printers are calibrated at the factory, what on earth 
is
ColorBase for, and
why would you need it?

My own testing shows that the visible difference between printing with 
the
calibration file
active, and not, with both Epson's provided profiles and my own created 
with
Gretag
Macbeth's Eye One for my 4800, are very slight, but visible. On 
Enhanced Matte,
my usual
paper, I can see a slight increase in red density, as the most obvious
difference."

--- In colorvision_group@yahoogroups.com, CDTobie@... wrote:
>
> I don't really expect this will be superior to simply profiling the
> printer with PrintFIX PRO, or Spyder3Print. The place where ColorBase
> would be useful would be if you owned two or more printers of the 
same
> model, that did not print similarly, and you wished to match them to
> each other, so that you could print interchangably to them using the
> same profile...
>
> C. David Tobie
> Product Technology Manager
> ColorVision, Inc.
> CDTobie@...
> www.colorvision.com






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