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A four-clor brochure ?

Posted by Michelle on April 02, 2004

I spotted some article which compliments on the University of Claria and tries to convince ppl that it is a good palce to obtain a quailty education but with some comment in the guest book saying that "Much more work is needed by the public relations department before this can be made into a four-color brochure and handed out to prospective student. ",what's a four-clor brochure ?and what do those four colors represent represent respectively?tks