Re: Color accuracy in copying paintings
Re: Color accuracy in copying paintings
- Subject: Re: Color accuracy in copying paintings
- From: Igor <email@hidden>
- Date: Mon, 22 Jul 2002 22:13:05 +0200
If you put down a red pigment on paper it will absorb all wavelengths of
light except red, which it reflects. Now add a green pigment...it will
absorb all wavelengths of light except green. If red absorbs green and
blue
and green absorbs red and blue you now have no light reflected. You now
have black. While you can put down pigments with red, blue, and green
reflectance, you cannot produce a tristimulus reflected light system
that
will reproduce a reasonable color gamut. If you put down any two of
the RGB
pigments you get black.
In the pre-powermac era I used to make airbrush illustration by hand.
Non-digital, that is. Gouache on paper. I found that no way you can make
a decent illustration using C, M, Y and K. Maybe you can when using
transparent inks. But I used gouache. I used 5 colours most of the time:
red, yellow, blue, black and white. But I got the widest gamut using
some 7 colours: yellowish red, purple-ish red, orange-ish yellow,
greenish yellow, green, greenish blue and purple-ish blue.
That isn't exactly RGB. But it ain't CMYK either. It is in fact an
adaptation of the good'ol red-yellow-blue system.
I know many scientists may not agree, but it works best in the every
non-digital life.
I wouldn't be able to tell how to copy these colours accurately
though....
;-)
Igor Asselbergs,
Tricolore
www.tricolore.com
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