Re: How to find colors monitor doesn't see

[Steve Upton <upton@chromix.com>]

<x-flowed>At 10:10 PM -0400 8/8/01, PhotoRoy6@aol.com wrote:
>Epson dye printers are supposed to be able to print colors that the monitors
>can't display. How do I find these colors?

you need to graph the gamut.

The cheap method is to go to our site and download GamutView. Then 
(in Photoshop, with the 9 slice file) choose your monitor profile in 
the proofing setup and select out of gamut colors (leaving the 
selection active). Then choose your Epson profile in the proofing 
setup and turn on gamut warning.

The more effective method is to get a graphing package like our 
ColorThink and build accurate 3D graphs.

At 10:09 AM -0400 8/9/01, Paul Corsa wrote:
>Are you sure? I thought it was the monitor that could show millions of
>colors, while printers output thousands? That is the whole concept of
>gamut- to show on the monitor an aproximation of what your printer can
>produce. Paul

They produce different colors, think of a circle fitting over a 
triangle. I did a quick graph of it in 2D a while back. Check it out 
here:

<http://www.chromix.com/chromix/pages/cm/colorres.lasso?-token=430>

Even though the RGB encoding of a monitor will support 16 million 
settings, a typical monitor will have a gamut volume of about 2.2 
million colors. An Epson will vary a lot but have around 1.2-1.8 
million colors. (these are calculated volumes, the actual number of 
colors the human eye can see is best left for another argument, uh, 
thread)


Regards,

Steve Upton

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