Due to continued sharp raw material cost increases, Siegwerk has to raise prices as announced on Feb. 1, 2011 on the Siegwerk web site. Effective April 15, 2011, Siegwerk will increase gross invoice prices for all products for Paper and Board applications. An average of 8 percent price increase will be applied on the following product groups: • Clears (overprint and extender varnishes, primers, etc.) • Colors and metallics • Others Except in the cases below where a fixed price increase ...