2 cents
2 cents
- Subject: 2 cents
- From: "JLKSHORE" <email@hidden>
- Date: Mon, 19 Feb 2001 17:33:41 -0600
Eye yi eye yi eye,
Absolute vs. relative
relative acts like a catchlight drop out on all of the profiling softwares
I've seen.
Customers don't like the simulation of the paper tint when using absolute
because of the
contrast between the paper stock and the tint.
When accurately matching a high key image I recommend absolute, absolutely.
Again, the paper is critical and yes "like" products differ, Take a proof
and measure
the color bar across the sheet and notice the delta E change dramatically,
i.e. analogue
Matchprint. The objection also to "absolute" was the paper tint bounding
around images.
Papers
Of course you can soften this by trying to match papers as best as possible
but how does the measuring device see the paper? Does the stock have
fluorescent properties and is the measuring device accurate. i.e. DTP41UV
(ultra violet) Price vs. quality? Colorshop is an Xrite software
which from I've seen is an excellent color checker.
Linearization
Best has had some issues with the linearization software as I know it gets
confused
with calibration. Calibration vs. Characterization. The latest Best Color
Software
4.2.2 I believe resolves some of the confusion (easier to use)
I am headed to Cincinnati next week for training and will be glad to share
info.
At a small fee. (Har HAr) who pays these days. But seriously, the last point
is
extensive testing as far as papers and inks has been done and in light of
reinventing the
wheel especially since some manufacturers have locked users out from
linearizing
any other paper than their own makes it impossible to profile much less
interchangeably
use generic profiles within the similar applications.
Profiles between Applications
Therefore, the trial and error approach and recommendations to use RGB
reference profiles to output to CMYK may be an attempt to try what may have
worked in one case but may not in another.
Terminology
Also, the terminology has been misconstrued. I know one manufacturer calls
the reference the destination and visa a versa. So, its important to be
specific.
Last note - I was wondering
if Colorblind Edit is capable of smoothing the toe of the highlights so as
not to get harsh breaks in the paper tint when going to "relative." My
opinion is that this is a limitation
in the 8 bit data on output where there isn't enough steps in the algorithm.
Black Overprint
As far as black overprint - a device link helps this by translation, whether
its transparent to the user (built into the interface) or a manual step
after profile creation. Again this is my guess as for example UCR/GCR. This
is why I like the Best Color with Print Open and a DTP41UV.
Doesn't Colorsync use the Lino engine?
Conclusion
I look at this profiling like a Hell analogue scanner converted to software.
I would like to
"trace the signal" to see how to control the color and how the different
Profiling packages map
RGB to Lab to CMYK. The ranges, bit depth, density, grays, colors and
gradation.
I think I used up more like a dollars worth!
jj
Twin Image, Corp.
1421 Gamon Road
Wheaton, IL 60187
630.221.8427