The Collaborative International Dictionary of English v.0.48:

Lithotypy \Li*thot"y*py\, n. [Litho- + -typy.]
   The art or process of making a kind of hard, stereotype
   plate, by pressing into a mold, taken from a page of type or
   other matter, a composition of gum shellac and sand of a fine
   quality, together with a little tar and linseed oil, all in a
   heated state.
   [1913 Webster]