Printing machine. Modern printing machine is generally composed of edition, ink, printing, paper and other institutions (including folding). Its working principle is: first to text and image printing printing plates, installed in the printing machine, and then by hand or press the ink coating on the printing plate a text and image, and then directly or indirectly transfer to the paper or other substrate (such as textiles, metal plates, plastic, leather, wood, glass and ceramics), so as to reproduce the printing and printing the same. The invention and development of printing machine, plays an important role in the spread of human civilization and culture.