Process art is an American art form. A process is temporally and materially the course of an event, thus in Process art, the process of manufacture becomes the relinquishing of the creative act.
The object arising from the creative process serves as a material witness of its creation, and subsequently has less importance than the act itself. Thus Process art is less a style than a general term used to describe specific artistic approaches. Process art is also ephemeral, and no object remains at the end of the process. During the 1960s, Richard Serra and Robert Morris created works that could be described as exemplary Process art. Serra (born 1939) explored the qualities of liquid lead, when he threw it against a gallery wall. ("Splashing", 1968). Robert Morris (born 1931) showed the observer a process of change, by continually altering an arrangement of material over a specific period of time ("Continuous Project Altered Daily", 1969). These kinds of works illustrated the link to Action Art, Land Art, and, through the reduction of artistic materials, Minimal art. In addition post-Minimalist art can be linked with Process art, as in both, sculptural work is characterised by an action-centred component. This is exemplified in Informel art and Action painting. Artists who pursued the principles of Process art included Barry Flanagan, Eva Hesse and Keith Sonnier.