Commercial offset printing, also known lithographic printing, remains one of the most common ways to create printed informational, educational and promotional materials for businesses of all sizes. It is the traditional printing method, with origins dating back to the early 1900s, that applies wet ink to the surface of an image on a printing plate. That image is then subsequently transferred to a blanket roller that is then transferred to the desired material. Offset printing is valued for the consistent, high-quality printing, color and the sharp images the process delivers. There are two categories of offset printing: web offset printing (which prints at high speeds on large rolls) and sheet offset printing (when individual pages of paper are fed into the printer). Both provide the ability to print on practically any flat surface. Businesses generally use commercial offset printing for high-volume projects as costs per printed items decrease as quantity increases.