LITHOGRAPHY printing involves drawing with a grease crayon on a special porous flat-surface stone. This may also be called PLANOGRAPHY.

• A grease crayon is used to draw on the flat surface of the lithography stone matrix.

• A liquid chemical mixture is applied on the stone to adhere the grease crayon.

• The surface is dampened with water and the chemical liquid is washed away.

• The surface of the stone matrix is inked with a roller or brayer.

• The oily ink attaches to where the crayon was drawn.

• A moistened sheet of paper is pressed against the stone, usually using a printing press.

• A print is pulled, resulting in a positive image, that is, the drawn lines are the same as the printed image.