Ink makers in Europe are expecting another year of steady growth in demand. Sales of inks went up by an average of 2 to 3 percent across the region last year. With European economies expected to expand at only a slightly lower rate this year, revenues from inks should accelerate at a similar pace to that in 2006.     The increase in demand for printed products has been strong enough for ink producers to gain significant increases in their selling prices for the first time fo...