Method for printing sheets

A method for prime and perfecting printing of sheets in a sheet-fed rotary printing press including:

• providing a feed stack of sheets;
• passing sheets from said feed stack of sheets in a first printing passage through a printing press;
• printing a first side of each of said sheets during said first printing passage with a prime print subject and with a perfecting print subject located next to it;
• providing an intermediate sheet storage device;
• delivering said sheets printed during said first printing passage through said printing press to said intermediate sheet storage device;
• placing said sheets printed during said first printing passage on said intermediate said storage device with a first printed side facing up and with leading sheet edges facing away from a printing cylinder of said printing press;
• temporarily storing said sheets printed in said first printing passage in said intermediate sheet storage device;
• rotating said temporarily stored sheets through 180° in a plane defined by said temporarily stored sheets;
• pressing said sheets from said immediately stored sheets in a second printing passage with said printed first sides contacting said printing cylinder and with said leading sheet edges facing said printing cylinder;
• printing a second side of each of said sheets during said second printing passage with said prime print subject and said perfecting print subject located next to it;
• providing a process control and using said process control for checking the fully automatic printing process during said first and second printing passages through said printing press having one printing forme for said prime printing and said perfecting printing;
• providing a sheet delivery device and delivering said sheets printed on both said first and second sides to said sheet delivery device;
• and
• providing an end storage device and delivering said sheets printed in said prime and said perfecting print to said end storage device.