A printing press is a machine that prints text and images. Modern printing presses are generally composed of plates, inking, embossing, paper feeding (including folding) and other mechanisms. Its working principle is: first make the text and images to be printed into a printing plate, install it on the printing machine, and then manually or by the printing machine apply the ink to the place where the text and images are on the printing plate, and then directly or indirectly transfer the ink. Printing onto paper or other substrates such as textiles, sheet metal, plastic, leather, wood, glass and ceramics to reproduce the same print as the printing plate. The invention and development of the printing press played an important role in the spread of human civilization and culture.