Re: Color accuracy in copying paintings
Re: Color accuracy in copying paintings
- Subject: Re: Color accuracy in copying paintings
- From: "Ernst Dinkla" <email@hidden>
- Date: Sat, 20 Jul 2002 23:05:14 +0200
----- Original Message -----
From: "Terry Wyse" <email@hidden>
To: "ColorSync User List" <email@hidden>
Sent: Saturday, July 20, 2002 3:32 PM
Subject: Re: Color accuracy in copying paintings
>
on 7/20/02 4:27 AM, Tony Riley wrote:
>
>
> I think the shortcomings in reproducing rgb pigments
>
> in paintings...
>
>
There's no such thing as RGB pigments. RGB is additive color,
CMY is
>
subtractive. To put another way, RGB is light and CMY is
pigment/paint/dye.
>
>
Of course, I could be wrong. :-)
There are RGB pigments, dyes, phosphors and I guess even other
colorants. Problem is you need a lot of light to get an additive
RGB system of colourmixing working. Monitor and television CRT's
are the best examples of RGB additive mixing. Lumiere's
Autochrome, early Agfachrome, Finlay etc slide films showed that
RGB additive mixing was possible and the first was a commercial
success. Polaroid did some attempts to bring additive RGB film
back as an instant 8 mm movie / 35 mm slide film. All those
systems used dyes though with their higher transparency. The
difference between RGB and CMY colourmixing is that the first has
to be additive and the second subtractive and the first needs a
lot more light than the second.
Ernst
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.