In 1972, former Metropolitan Museum of Art curator Henry Geldzahler said: Color field, curiously enough or perhaps not, became a viable way of painting at exactly the time that acrylic paint, the new plastic paint, came into being. It was as if the new paint demanded a new possibility in painting, and the painters arrived at it. Oil paint, which has a medium that is quite different, which isn't water-based, always leaves a slick of oil, or puddle of oil, around the edge of the color. Acrylic paint stops at its own edge. Color field painting came in at the same time as the invention of this new paint. Acrylics were first made commercially available in the 1950s as mineral spirit-based paints called Magna offered by Leonard Bocour. Water-based acrylic paints were subsequently sold as "latex" house paints, although acrylic dispersion uses no latex derived from a rubber tree. Interior "latex" house paints tend to be a combination of binder (sometimes acrylic, vinyl, pva and others), filler, pigment and water. Exterior "latex" house paints may also be a "co-polymer" blend, but the very best exterior water-based paints are 100% acrylic. Soon after the water-based acrylic binders were introduced as house paints, both artists – the first of whom were Mexican muralists – and companies began to explore the potential of the new binders. Acrylic artist paints can be thinned with water and used as washes in the manner of watercolor paints, although the washes are fast and permanent once dry. Water-soluble artist-quality acrylic paints became commercially available in the early 1960s, offered by Liquitex and Bocour under the trade name of Aquatec. Water-soluble Liquitex and Aquatec proved to be ideally suited for stain painting. The staining technique with water-soluble acrylics made diluted colors sink and hold fast into raw canvas. Painters such as Kenneth Noland, Helen Frankenthaler, Dan Christensen, Sam Francis, Larry Zox, Ronnie Landfield, Larry Poons, Sherron Francis, Jules Olitski, Gene Davis, Ronald Davis, Sam Gilliam and others successfully used water-based acrylics for their new stain, color field paintings. Legacy: influences and influenced The painterly legacy of 20th-century painting is a long and intertwined mainstream of influences and complex interrelationships. The use of large opened fields of expressive color applied in generous painterly portions, accompanied by loose drawing (vague linear spots and/or figurative outline) can first be seen in the early 20th-century works of both Henri Matisse and Joan