<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> APR-01-1998 <PERIOD-END> JUN-30-1998 <CASH> 3,911 <SECURITIES> 3,838 <RECEIVABLES> 34,439 <ALLOWANCES> (1,421) <INVENTORY> 20,113 <CURRENT-ASSETS> 68,374 <PP&E> 135,613 <DEPRECIATION> 59,267 <TOTAL-ASSETS> 176,673 <CURRENT-LIABILITIES> 47,785 <BONDS> 3,330 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 2,159 <OTHER-SE> 110,446 <TOTAL-LIABILITY-AND-EQUITY> 176,673 <SALES> 115,786 <TOTAL-REVENUES> 115,786 <CGS> 82,222 <TOTAL-COSTS> 82,222 <OTHER-EXPENSES> (247) <LOSS-PROVISION> (85) <INTEREST-EXPENSE> 285 <INCOME-PRETAX> 11,161 <INCOME-TAX> 3,761 <INCOME-CONTINUING> 7,400 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 7,400 <EPS-PRIMARY> 0.46 <EPS-DILUTED> 0.45