To improve the stability of a printing position, ink applicating properties at the beginning of printing and printing plate wear in a printing using a printing plate material with a plastic as a substrate.

A method for printing in which a block copy sheet material is placed between a printing plate material having an image forming function layer and a back coating layer, and a plate cylinder of a printing machine, is characterized by that a dynamic friction coefficient between the surface of the block copy sheet material and the surface of the back coating layer of the printing plate material is 0.1-0.5.