Re: Accurate PMS Color Printing
Re: Accurate PMS Color Printing
- Subject: Re: Accurate PMS Color Printing
- From: Hugo Kristinsson <email@hidden>
- Date: Sat, 26 Jul 2003 18:42:51 +1200
Russ,
It goes without saying that a printer with a large color gamut is more
capable of matching Pantone colors that a printer with a small color gamut.
If color is precisely controlled.
When measuring the Pantone colors you have to subtract the paper white as it
does have a significant impact on all readings.
You also have to be realistic, there is no way that these printers can print
the fluorescent colors without florescent inks, nor the metallic colors
without metallic inks.
I include some sample results from an Epson 7600.
Our paper white is
95,8 / 0,1 / -4,2
Results
Color 1
50 / 50 / 0 Target
47,2 / 49,8 / -4,7 Measurement
If you add the target color and the paper white together in Photoshop these
are the lab results, bear in mind that Photoshop only gives 8 bit
information about lab images.
47 / 50 / -3
-------------
Color 2
50 / 25 / 0 Target
47,6 / 25,6 / -3,7 Measurement
Added together in PS
47 / 25 / -3
We have not measured the whole Pantone library but this is an indication of
the precision.
If you look at the paper white and see how blue it is you should be able to
guess what the results printing the Pantone white colors look like. It would
have a bluer hue than the pantone swatch, then again if you print on a paper
stock with same paper white color on the offset press the results will
match.
We are all pushing for a perfect world but the world resists.
Colorful regards,
Hugo Kristinsson
Gimle Ltd.
Websites:
http://www.absolute-proof.com &
http://www.absolute-proof-asia.com
>
From: Russ Brown <email@hidden>
>
Subject: Re: Accurate PMS Color Printing
>
To: email@hidden
>
>
Please note that a large gamut and matching Pantone(r)
>
are mutually exclusive items. Just because a printer
>
has a large gamut, it does not necessarily over lap
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all of the Pantone colors.
>
>
Also define "matching Pantone(r)". Is this to a delta
>
E? What magnitude of delta E? It is unlikely any
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inkjet printer can actually match more than 92% of the
>
Pantone library within a 1 delta E. I have not seen
>
any inkjet printers that can print all the shades of
>
Pantone white, the C, CV and other coatings as well as
>
the fluorescent colors.
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