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Ink limiting for hue shift?


will not a good profile be able to deal with hue shift problems in these difficult colors anyway, even it not ideally?

Yes, I've heard that a 'good profile' will be able to handle a non-neutral linerization/ink limit. However, I have found that a profile can only go so far in correcting this problem. I have developed a habit of visually neutralizing at the linerization/ink limit stage before I continue on to creating a profile. Please bear with me as I explain. If we consider how many colors the human eye can see (let's just say there are several million for now) and if we consider how many color patches an ICC profiling package reads (the maximum in Monaco is 2989 patches) then you can understand that there is a huge amount of 'interpolation' between what the profiling software reads and what the human eye can see. In other words, from and extremely limited number of colors, the profiling package must 'guess' exactly how millions of colors will be created. The only way a profiling package can do this with any degree of accuracy is if it is fed data from a 'linerized' printer - or a printer than can print fairly close to neutral through linerization and ink limiting. I know I will be 'pinged' on this assertion, so I'll hold further explanation for the future.

...(testing) shows that there is generally much more usable individual ink density range

Yes! The idea that we must hold every single primary ink combination to a global ink density is insane if in fact Magenta and Yellow can hold 200 without problems and Cyan and Magenta max out at 180. ONYX has discovered this concept as well, and Scott Saltman of American Imaging Corporation (www.inkjetcolorsystems.com) is said to have pioneered this concept (though, they do not credit Mr. Saltman).

I look forward to seeing how this thread will develop.

Kevin Muldoon
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