Aug 1 (Reuters) - Portugal's Navigator Company SA NVGR.LS :
* SAYS TO RAISE PRICES BY 5 PERCENT FOR ALL NAVIGATOR NORTH AMERICA PREMIUM OPAQUE OFFSET PRINTING PAPERS
* SAME INCREASE APPLIES TO ALL CUT SIZE PAPERS
* EFFECTIVE FOR ORDERS SHIPPING SEPT. 1
* ADDITIONAL FREIGHT SURCHARGES FOR SHIPMENTS TO WEST COAST, MOUNTAIN STATES, AND NORTHERN PLAINS STATES. Further company coverage: NVGR.LS