Posted by
Russell Standish-2 on
Nov 03, 2014; 3:18am
URL: http://friam.383.s1.nabble.com/Printer-Qs-tp7585775p7585776.html
On Sun, Nov 02, 2014 at 07:47:42PM -0700, Gillian Densmore wrote:
> Anyone care to speculate why printers don't use Red Green Blue +
> Saturation, I ask as you can make most any concievable color this
> way.
>
You just need to ask an artist who uses real paints this. Basically,
pigments work by absorbing certain frequencies. If you absorb red, the
resulting pigment looks like cyan, if you absorb green, you get
magenta and if you absorb blue you get yellow. By mixing these three
pigments on the page in different amounts, you can absorb differing
amounts of the RGB components of the incident light.
Printers will usually also add a black pigment, because if you add
equal parts of cyan, magenta and yellow, the result looks like a murky
brown, rather than the crisp black that you'd like.
Also note that children tend to learn these "secondary" colour
combinations, such as yellow+blue (really cyan) makes green, and so
on, because they're exposed to it through paints.
The next generation, brought up on iPads, may well learn the
primary combinations eg "red+green = yellow".
Cheers
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Principal, High Performance Coders
Visiting Professor of Mathematics
[hidden email]
University of New South Wales
http://www.hpcoders.com.au Latest project: The Amoeba's Secret
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http://www.hpcoders.com.au/AmoebasSecret.html)
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