RE: Color accuracy in copying paintings
RE: Color accuracy in copying paintings
- Subject: RE: Color accuracy in copying paintings
- From: Ray Maxwell <email@hidden>
- Date: Mon, 22 Jul 2002 14:43:42 -0700
Hi Igor,
I should have said that I am referring to transparent overprinting
techniques. When you use opaque inks or oils, you are in a whole different
world.
Orginals are one thing...reproductions are another.
Ray
Ray Maxwell
Senior Color Systems Engineer, Inkjet Printing
Creo Inc.
4225 Kincaid Street
Burnaby, B.C.
Canada V5G 4P5
Phone (604) 451-2700 ext. 2004
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From: Igor
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Sent: Monday, July 22, 2002 1:13 PM
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To: email@hidden
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Subject: Re: Color accuracy in copying paintings
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> If you put down a red pigment on paper it will absorb all wavelengths of
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> light except red, which it reflects. Now add a green pigment...it will
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> absorb all wavelengths of light except green. If red absorbs green and
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> blue
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> and green absorbs red and blue you now have no light reflected. You now
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> have black. While you can put down pigments with red, blue, and green
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> reflectance, you cannot produce a tristimulus reflected light system
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> that
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> will reproduce a reasonable color gamut. If you put down any two of
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> the RGB
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> pigments you get black.
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>
In the pre-powermac era I used to make airbrush illustration by hand.
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Non-digital, that is. Gouache on paper. I found that no way you can make
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a decent illustration using C, M, Y and K. Maybe you can when using
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transparent inks. But I used gouache. I used 5 colours most of the time:
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red, yellow, blue, black and white. But I got the widest gamut using
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some 7 colours: yellowish red, purple-ish red, orange-ish yellow,
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greenish yellow, green, greenish blue and purple-ish blue.
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That isn't exactly RGB. But it ain't CMYK either. It is in fact an
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adaptation of the good'ol red-yellow-blue system.
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I know many scientists may not agree, but it works best in the every
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non-digital life.
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I wouldn't be able to tell how to copy these colours accurately
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though....
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;-)
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>
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Igor Asselbergs,
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Tricolore
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www.tricolore.com
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