Re: /True Color System
Re: /True Color System
- Subject: Re: /True Color System
- From: email@hidden
- Date: Tue, 10 Jun 2003 21:16:49 EDT
From this description, and the website, this looks like a standard CMYK
swatchbook, perhaps in a bit more comprehensive form. But it still works in the
analog manner, that is to say: the colors are defined as CMYK recipes, and not as
colors (say as Lab values). This is analogous to a phone book that has all
the phone numbers in order, followed by the person's name... hard to use to look
up someone's number when organized that way. From a color management point of
view we are much more interested in the reverse tables: not what colors you
get from a range of CMYK recipes with assorted inks and papers; but what
recipes you get for assorted colors. So that, for a given Lab value, you could see
what CMYK would be needed to reach it, and what different recipes would make
this same color on different substrates, or with different inks, or different
screening, or black generation.
Of course we really would like these tables to be built into ICC press
standard profiles for us too, so we can use them, not just look at them... and know
that when we send Lab value YYY to this device the result will be CMYK value
ZZZZ (given a specific seperation profile), and here is that swatch on screen,
and there is that patch in the book. Of course printing the same tables on our
proofers and cross checking the colors from the press standards to what we
are getting on the proofing device with a spectro would be part of the deal too.
Ideally each page would have a CMY and K ramps on the edge for proofing
certification.
If its necessary to build the profiles from the book yourself, then the whole
thing becomes quite labor intensive and inconvenient, and if the swatches are
not defined with Lab as well as CMYK values, then thats another area that
would require a lot of extra work... having to measure any patch you are
interested in, instead of having the approximate Lab value already listed.
I suspect that this color management oriented view was not the one this system
was designed for; I describe it here mostly to explain to the developer how
our expectations may vary from his intended uses.
C. David Tobie
Design Cooperative
email@hidden
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