[CentOS] force b/w printing

[John Doe]

From: Janez Kosmrlj <postnalista at googlemail.com>
>Has anyone an idea, how to force users to print b/w on a color printer.
>We are in the process to deploy color printers to some of our offices where they 
>
>use centos 5.5 as their OS. They need the printers to print some advertisement 
>material. But for everything else, they don't need it. And because of the costs 

>of the color printing we would like to force them to use B/W where not 
>explicitly necessary. Is there a way to force  a printer driver to be just B/W 
>even if it is a color printer. So i could install a second color printer which 
>would only be available to a special print user. 

Google says:
http://osdir.com/ml/printing.pykota.user/2006-04/msg00098.html

JD