What is the difference between a lithograph, an etching, serigraph, etc.?
Lithographs differ from etchings, engravings, serigraphs and woodcuts in materials and process. For example, etchings and engravings are printed from a metal plate with incised lines while a lithograph is made from a chemically treated, flat surface. A serigraph is a silkscreen print, and woodcuts are printed from blocks of wood carved in relief.