SEAL CARVING APPARATUS AND SEAL CARVING METHOD

摘要

A seal carving apparatus (10) includes a thermal head (12) having a plurality of heat generating elements (12a) disposed in lines, and thermal drive control means (24) that performs a control process of selectively and thermally driving the individual heat generating elements while moving the thermal head and a porous material in relative to each other with the thermal head (12) being in abutment with the porous material, thereby forming a seal face on the porous material. The thermal drive control means (24) controls a pulse time width for thermally driving the individual heat generating elements (12a) of the thermal head under PWM control based on gradation image data having a gradation value, thereby forming a seal with a gradation on the porous material.