As cost-sensitive newspaper publishers have observed for years, there is only one truly basic difference between fresh and used paper: ink. Largely because of ink's stubborn presence, U.S. newspapers, which pay a near-prohibitive $134 a ton for fresh newsprint, get less than $20 a ton for used newsprint, which is repulped and pressed into a coarse grey cardboard of the sort used to stiffen the backs of scratch pads and freshly laundered shirts. If there were an economic and efficient way of removing the ink, waste paper could be used over and over again. Last week in Chicago, Marshall Field's Sun-Times...
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