Re: metamerism and metameric color - more
Re: metamerism and metameric color - more
- Subject: Re: metamerism and metameric color - more
- From: Samer Mady <email@hidden>
- Date: Wed, 20 Jun 2001 09:27:04 +0200
>
Okay, then let me supply you with a second object to get this back under
the
>
heading of metamerism. If I print two copies of the same image, one on an
>
Epson 2000p, and one on a LightJet, and balance the Epson image to match
the
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Lightjet image at one light temperature, then the LightJet print will still
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hold appropriate skintone balance under differing lighting, while the Epson
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print will not. the Epson print's skintones will appear more yellow or more
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red (or even more green) than the skintones in the true photo process
print.
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Yes, the LightJet print will change (as any object will) with differing
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lighting, but not in variable, unexpected, extreme, objectionable ways...
>
that kind of differential change is what is being referred to here.
the example you are giving is also not an example of metamerism. again we
have to stick to the definition of metamerism ( two colors possesing the
same trichromatic values but differ in the spectral distribution). if i have
only one colour it is certainly not metamerim, but samething else. maybe the
reason for the unexpected change of the color of the Espon print is the fact
that the Epson inks absorb UV and reflect the energy of the UV in the visual
spectrum. when changing the Illumination to an Illumination which contains
less UV this will result in an a dramatic change of the Hue. which means the
Epson - Inks are not metameric but fluorescent
samer mady
email@hidden
BEST GmbH, Germany