Laser printer is a common printer, able to print data in paper quickly and in large quantities. It performs a xerographic printing process, when a document is sent to the printer, a laser beam "draws" the document on a selenium-coated drum using electrical charges.
How it works
Offset printing is a method of mass-production printing in which the images on metal plates are transferred (offset) to rubber blankets or rollers and then to paper. A plate is made up of areas that are receptive to grease and areas that are receptive to water. The areas receptive to grease hold onto the ink while the other areas attract water and repel the ink.
The advantages of this method:
Offset printing now became the most common printing technology in commerce printing. Color printing creates colorful images and characters contrast to black-and-white printing. The common method is offset printing used four color known as CMYK, or six color method.