As 2006 comes to a close, ink manufacturers find themselves looking back on a year full of challenges as well as hope, while wondering what the future may bring in terms of consolidation, raw material prices and overseas competition.     After 2005’s unprecedented wave of consolidation, the ink industry remained relatively quiet. In terms of financial results,  most of the major ink manufacturers reported that they fared better than in recent years.       Still, major moves have occurred on the ...