Litho printing, also known as lithography or lithographic printing works on the basic principle that oil and water do not mix. Unlike relief printing where the image and non-image areas are at different levels, in lithography there is only one surface.

In lithography a plate is treated in a manner so that the image areas attract the oil-based inks and the non-image wet areas repel the oil-based inks. When the plate is pressed against the surface to be printed on, the oily inked image areas leave an imprint of the desired design.

Litho printing is suitable for larger runs of leaflets, brochures etc. This is partly due to the time needed to prepare the plates for printing.