LITHOGRAPH / STONE LITHOGRAPHY
This is the process of printing from a stone, or metal plate, that has been ground and lapped flat. The design to be printed is drawn or printed on the stone using an oily pigment, while the rest of the stone is treated to absorb water. The stone is charged with oil-based ink by dampening it, then rolling an inked cylinder across the surface which accepts the ink on the design, but not the dampened areas. A print is made by placing paper on the stone and pressing the paper. Abbreviated Litho.
The three images show stones for lithographing different types of documents.