Re: Profiles for my Roland Hi-Fi Jet FJ500
Re: Profiles for my Roland Hi-Fi Jet FJ500
- Subject: Re: Profiles for my Roland Hi-Fi Jet FJ500
- From: Rudy Vonk <email@hidden>
- Date: Tue, 28 Aug 2001 09:24:59 +0200
Toshia McCabe wrote:
>
The ICC spec allows for N-channel profiles. Look at the description for the
>
"color space" header tag in the ICC spec. The signature you'd use is
>
something like "8CLR".
I believe I have aired my views on this in another list a while ago, but
I respectfully suggest that it is a mistake to consider LM and LC as
"colors" in the ICC Color Management sense. The algorithm the RIP uses
to determine the split between full and diluted inks is, to me, part of
the process to lay down Cyan and Magenta, and it is this process I
profile. (Some RIPs will let you influence this algorithm, some won't.)
Now you are down to six colors (CMYKOG), which can also be profiled in a
way similar to what Toshia describes. Whether you would want to depends
first and foremost on whether the RIP also has its own mechanism for
separating out Orange and Green from CMYK data, and if so, whether you
can switch this off (e.g. implicitly by providing a six-color profile).
Secondly it depends on your ability to separate into six colors upstream
from the RIP.
(Constructive flaming is welcome.)
BTW I seem to recall that the canned profiles Roland shipped with my
machine for its ColorChoice RIP (which I do not use) are *all*
straightforward CMYK profiles. I do not argue that six-color profiles,
if you can work with them, wouldn't give you better control and possibly
a larger gamut, but I *do* argue that dragging LC and LM into the
profiles is pointless and counterproductive.
--
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Rudy Vonk
Oviedo, Spain
<email@hidden>
+34 607 354100
You can't always want what you get.
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