RE: Monaco vs. Gretag Neutrals Analysis
RE: Monaco vs. Gretag Neutrals Analysis
- Subject: RE: Monaco vs. Gretag Neutrals Analysis
- From: "Michael Fox Photography News Account" <email@hidden>
- Date: Thu, 5 Jan 2006 09:35:21 -0800
- Organization: Michael Fox Photography
Well, I tried your suggestion Dan, regarding turning off Intelligent Black.
It makes essentially no difference. The neutrals in Monaco still show
reversal and lightening between dMax and L*0. Observing the data tab in
ColorShop X, I can see only very slight (on the order of 0.01) changes in
chroma error and output L* between intelligent black and no intelligent
black (with the no intelligent black option being 0.01 higher/lighter).
Bummer. Time to call X-Rite, I guess.
Michael
________________________________________
From: Michael Fox Photography News Account [mailto:email@hidden]
Sent: Wednesday, January 04, 2006 9:47 PM
To: 'Dan Reid'
Cc: 'colorsync'
Subject: RE: Monaco vs. Gretag Neutrals Analysis
Hi Dan,
Thanks for the response. Yeah, I guess Im a glutton. Dont really have
the time but I sure am learning a lot!
Actually, what you describe below regarding the RIP total ink limit setting
isnt the problem. The total ink limit in the RIP is typically very high
(on the order of 360 or above) while the ideal TAC in the profile tends to
be in the range of 250-300 (depending on the paper, of course). So the RIP
total ink limit never comes into play in the profiles Im building in the
250-300 range. Its a good point to watch out for, but not the problem in
this case.
I will try turning off the intelligent black option to see if that helps.
If it stops the not so intelligent drop-outs towards L*=0, as you say,
then Ill be very, very happy. Thanks for that.
Michael
--------------------------------------
Hey Michael,
Boy you are a glutton for punishment and have too much time on your
hands to try all these permutations. That said, its nice to explore and
learn the hard way!
I can tell you this short and sweet that your TAC (total area
coverage) aka TIL (Total ink limit) is a big factor. You can determine the
TAC sweet spot by measuring in ColorPort and importing to ColorshopX to
determine which setting offers the darkest L* value.
Say its 260% coverage for arguments sake. It would make a whole lot of
sense to NOT send a profiling chart with more than 260 ink coverage
otherwise the RIP guardians of ink limit will cut back the profiling charts
values to meet no more than 260% (thats what they are supposed to do,
right?). So sending a 400% profiling chart to a RIP with a 260% would not be
such a great idea.
Youll find that MonacoProfiler easily allows you to modify TAC settings
for profiling charts prior to saving them out. In ProfileMaker youll have
take a trip to MeasureTool to create a new target with the desired ink
limiting.
You might be surprised by the results you get then. BTW this will HUGELY
affect black generation in the profiling application, aka neutrals.
Also try disabling intelligent black in MonacoProfiler and youll see
the not so intelligent drop-outs towards L*0 go away. :) Actually they are
not soo soo bad but it definitely defies most sound reasoning.
Have fun!
--
Dan B. Reid
RPImaging
Color Management Products & Training for Print, Internet, & Motion Graphics
http://www.rpimaging.com | Toll Free: (866) RGB-CMYK
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