The printing is from a stone (lithographic limestone) or a metal plate with a smooth surface. It was invented in 1796 by German author and actor Alois Senefelder as a cheap method of publishing theatrical works. Lithography can be used to print text or artwork onto paper or other suitable material.
What is a lithographic crayon?
Used along with, or in place of tusche (lithographic ink), these dense, black crayons are especially designed for sketching directly on a lithographic stone, screen, or grained paper master for lithographic printing. Ideal for drawing on paper as well.