Digital BW, The Print

By the way, there's a great article about using channel mixer for B&W
in this months issue of Photoshopuser magazine (www.photoshopuser.com), 
written by
Jack Davis, Ben Willmore, and Linnea Dayton.  Peter G.

. . .

Sarah

  Thanks.  I guess I get the notion of, say, 50% red, 25% blue, 25% 
green.
  The luminance stays the same and we are choosing the weighting of 
RGB.  But
  what about a channel value greater than a 100% or negative channel 
values?

  Steve

  

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