Within a few years the materiality of oil paint takes on a more central role in his work when he begins to make paintings by depositing small amounts of liquid paint onto his canvases and tilting them this way and that to direct the paint toward the edges of some feint pencil markings. (thesilo.raphaelrubinstein.com)
It was here, during the period 1946 - 50, that he abandoned traditional methods of fine art painting in favour of his own technique of working with liquid paint: a method commonly known as «action painting». (visual-arts-cork.com)
Bishop: They have to be stretched, and they have to be flat on the floor, or I can't work with my very liquid paint. (brooklynrail.org)