Carl Weese (cjweese@wtco.net)
Fri, 08 Jan 1999 17:12:37 -0500
Judy,
What you are likely seeing is the CMYK inks used to imitate a duotone.
That is they are not used to make a normal photorealistic reproduction
of the black and white original, but the CMY plates are used together to
approximate the effect of a warm gray or cool gray duotone plate while
the black printer does the obvious. The difference is that you aren't
using the scanner to "reproduce" a near-neutral colored original, but
using the CMY inks to create an arbitrary virtual second plate without
having to change inks or interrupt a press run. BTW, the stronger the
coloration added, the easier it is to run consistently on press. The
closer to neutral, the more likely it will vary all over the map and
drive the pressman crazy.
---Carl
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