Auto-destructive art is a term invented by the artist Gustav Metzger in the early 1960s and put into circulation by his article "Machine, Auto-Creative and Auto-Destructive Art" in the summer 1962 issue of the journal Ark. From 1959, he had made work by spraying acid onto sheets of nylon as a protest against nuclear weapons. In his Acid on Nylon Paintings this procedure produced rapidly changing shapes as the nylon disintegrated before being totally consumed by the hydrochloric acid. Metzger produced many other works that were simultaneously auto-destructive and auto-creative, such as his Liquid Crystal Light Projections that necessitate the destruction of an existing form for the creation of a new form.