Re: Spot Color tables in Best ColorProof
Re: Spot Color tables in Best ColorProof
- Subject: Re: Spot Color tables in Best ColorProof
- From: neil snape <email@hidden>
- Date: Mon, 02 Jun 2003 17:40:04 +0200
on 02/06/2003 5:37, Marco Ugolini wrote :
>
I have trouble accepting that. A profiled CMYK device space is NOT
>
descriptive of the WHOLE of the device's printable color space. A profiled
>
CMYK space does NOT contain all of the device's printable colors! There are
>
colors outside that profiled space that are still printable on the device
>
(certain blues, greens, purples, bright reds, etc.), but are ignored by the
>
CMYK profile because they never occur in a typical CMYK scenario on press.
>
Or are you saying that the CMYK profile contains ALL of the printable colors
>
achievable on the device?
When you decide the base densities and ink limits in Best you are at that
point deciding on the boundaries at these settings. When you print out the
profile chart you are building a description of what colors are reproduced
at the sent values. They are not limited to a press gamut or any rigid
reference print , merely the character at these settings. The profile has
it's own created lut's that I'm sure you're aware are grid points onto which
values are interpolated between the measured correlated points. The Lab
values of spot colors should bypass the CMYK cross referenced press and
output to the interpolated values at the full gamut of the said base
linearisation/ink limiting. You can run different set ups for max gamut >max
spot color yet at the determent of the grey balance and 3/4 tone separation.
Neil Snape
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