Printing machines are devices used to transfer text and images onto various surfaces, primarily paper. They come in different types, including offset printers, inkjet printers, and laser printers, each serving specific purposes. These machines work by applying ink or toner to a substrate, allowing for mass production of printed materials like books, newspapers, and labels. The evolution of printing machines began with the invention of the printing press by Johannes Gutenberg in the 15th century, which revolutionized the way information was disseminated. Today, modern printing machines are equipped with advanced technology, enabling high-speed production and high-quality prints, catering to both commercial and personal needs.