Re: ICC profiles for Roland HiFi-500 ColorChoice RIP.
Re: ICC profiles for Roland HiFi-500 ColorChoice RIP.
- Subject: Re: ICC profiles for Roland HiFi-500 ColorChoice RIP.
- From: Joel <email@hidden>
- Date: Wed, 17 Oct 2001 09:42:25 -0500
Alexey Gribunin wrote:
> So now I cannot understand why Roland
prints 8 colors (8 heads) whith it's oun 4-colors profiles but do not wants
> to do it whith my profiles.
The RIP setup software within RCC looks for the expanded LUT
definition (CMYK with HiFi support) tag which is part of the Secret
Sauce in Scanvec's ColorCal generated profiles.
If you try to use a CMYK-only profile as a media output profile, RCC
will only offer you the CMYK Color Mode (or CMYK/CMYK if you are in
dual setup) and the CMYK profiles available.
But, as Dan Reid says, only if you send previously color corrected,
converted to media output profile destination space files like
Postscript and, yes, RCC supports DCS 2.0., you can turn off Color
Correction and fire away. Whether or not this exploits the expanded
ink set is open to debate.
From: Rudy Vonk <email@hidden>
If you have the appropriate profiling software, *and* the means to print
straight through to the printer bypassing this internal RIP algorithm,
you can in theory build a six-color profile (CMYKOG) which I am told
ColorChoice will respect, but frankly, this is probably a lot more
trouble than it is worth.
Painful yes, and there is no manual I can find, but the results are
pretty good when using ColorCal carefully. IMHO PrintOpen 4.0 and
several other profiling apps build better CMYK-based profiles but the
expanded LUT-based CMYK ColorCal profiles definitely exploit more
from the, dare I say closed, Roland workflow. BestColor and Monaco
appear to to be the only real contenders I've seen in this regard.
As mentioned in other threads before, it is my personal opinion that it
is conceptually wrong to consider LC and LM as separate colors in the
profiling context. They are part of the printer's mechanism to produce
Cyan and Magenta, and should be profiled as such.
Yes, when determining ink limits the relationship of each LcC and LmM
should be proportional, but their intended use as separate ink
channels is to extend the limited tonal range of Cyan and Magenta as
stand alone channels. Another extension of the pressworld's bag of
tricks which, though confusing, appears to work.
In my experience I have yet to see it proven or explained why
CMYKLcLm profiles are necessary if that is the only ink set chosen
(6inksets), but there is a part of me which says there must be a
reason. My experience is primarily CMYKOG.
However, this has put an idea for yet another test into my already
crowded head...thanks...I think.
Hope this helps...