Re: Epson Stylus Pro 9600 Extrachrome
Re: Epson Stylus Pro 9600 Extrachrome
- Subject: Re: Epson Stylus Pro 9600 Extrachrome
- From: Roger Breton <email@hidden>
- Date: Mon, 15 Nov 2004 20:56:51 -0500
Graeme Gill wrote:
> I think what you're talking about here is really "spectral matching" failure,
> not "metamerism" failure.
I'm under the impression that the change in appearance of color triggered by
a change of illumination is aply called illuminant metamerism. To me, that's
what's causing, visually, the change in appearance of Epson's pigment inks.
When I view the print under a Just/Normlich viewing booth I get one set of
color sensation. When I view the same print under tungsten I experience
another set of color sensation. And when I view it under a mix of sun and
skylight (D65 type) I get yet a turn set of color sensation. In this
equation, the observer is constant, me. So, what is it that causes the
change in appearance if not the change in lighting conditions?
> Another way of putting it is that a proof on an inkjet will match a press
> sheet
> over a broader range of illuminants, if the spectral characteristics of the
> inks
> on the two devices are similar.
> Graeme Gill.
Are you saying compare the spectral reflectance of the CMYK inks of inkjet
inks to those of the offset inks I'm trying to simulate? If the spectral
reflectances are remotely similar between the two systems there are good
chances I will see a match over a broad range of illumination? At what point
would you say the match is going to stop working? Any idea on how to
quantify that?
Regards,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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