To secure high printing compensation precision corresponding to paper shrinkage occurring independently vertically/horizontally even when various printing modes are varied in a printing control method for a tandem laser printer which can carry out spot color printing.
When printing misregistration in spot color occurring due to paper shrinkage caused by going through a fixing part every time each page is printed is compensated independently respectively for a front side cut paper laser printer and a backside cut paper laser printer by fine adjustment of paper feeding speed for the paper when toner is transferred to the paper from a drum according to vertical/horizontal direction shrinkage amount in the paper and by fine adjustment of frequency of oscillator determining on/off cycle of image data transmitted from a printer control part, optimization is executed according to a plurality of printing modes.
KOBASHI SADANORI
KAWAI YOSHINORI
