Re: Dry Time for UltraChrome inks/Calibration
Re: Dry Time for UltraChrome inks/Calibration
- Subject: Re: Dry Time for UltraChrome inks/Calibration
- From: neil snape <email@hidden>
- Date: Mon, 03 Feb 2003 00:11:56 +0100
on 02/02/2003 23:18, Alan Rew wrote :
>
Could you, or anyone else, please comment on whether this ink limitation
>
can readily be achieved by using the 'Paper Config / Color Density'
>
slider
>
in the Epson driver? If so, by how much?
The ink limitation or what is known as base linearisation in Best Color
limits the the end points so that a maximum density is achieved in the
primaries where adding ink no longer produces addition density. After these
end points are found the next step is to create a table that controls the
graduation steps between arbitrary points from Dmin-Dmax. Afterwards a
visual limit of the overprinting colors can be established.
The advantages of looking at hue shift vs maximum inking avoids the gamut
boundaries from curling back into itself (another hue) and produces more
useful grey balance, and graduations with limited color shifts.
Epson are supposedly going to make ink limiting a possibility on the next
generation printers using the rgb drivers. At this point the sliders will
affect gamma of the channels but not limit end points to a definable point
of Dmax with graduation step differences. Your media setting does indeed
limit the inks, yet can also change the desired resolution and diffusion
error to something you don't want.
Neil Snape email@hidden
http://mapage.noos.fr/nsnape
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