Re: Pantone
Re: Pantone
- Subject: Re: Pantone
- From: Graeme Gill <email@hidden>
- Date: Thu, 20 Feb 2003 16:24:15 +1100
Ulf Grossmann wrote:
>
I think you can't say, that a RIP is able to reproduce PANTONE Colors,
>
a much more important part is the Printer and Paper you use for
>
reproducing the colors. The Best Colorproof RIP is able to read the
>
Spotcolornames out of the file and connect them to an Lab or CMYK
>
Value. The Lab Value you can measure from your Swatchbook. How good
>
the reproduction of this color is depends only on the used
>
Printer/Paper combination and the consistency of the Paper Profile.
>
There are some combinations which can repoduce a wide range of PANTONE
>
Spotcolors (nearly 80%), but there are also many combinations which
>
can reproduce only some (40%). This is independent from the RIP!
There are several different aspects to rendering spot colors.
1) Gamut - the range of spot colors that can be accurately rendered.
This depends (as you point out) ultimately on the device/ink/paper
capabilities. It also depends on the RIP color separation algorithm,
since different usage's of black/light cyan/light magenta etc.
affect whether the full gamut of the device can actually be made
use of.
2) Accuracy - how faithfully the in-gamut colors are reproduces.
This depends on the RIP and its device characterization (profile)
accuracy, and color conversion engine operation.
3) Stability - how repeatably the colors are reproduced.
The primary variability is up to the device, but
most good RIPs have a calibration system that compensates
for device variability. If the device characteristics
don't vary too quickly, the stability will therefore depend
mainly on the RIP.
Bottom line, given a good RIP almost any reasonable printer
can be used to reproduce a sub set of Pantone spot colors with
good accuracy and stability. Unless the printer has actual spot
color inks or a RIP built into it, it's doesn't even know what
a spot color is !
Graeme Gill.
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| References: | |
| | >RE: Pantone (From: Ulf Grossmann <email@hidden>) |