Canvas white pigment and calcium carbonate is rather brittle and susceptible to cracking. As lead-based paint is poisonous, care has to be taken in using it. Various alternative and more flexible canvas primers are commercially available, the most popular being a synthetic latex paint composed of titanium dioxide and calcium carbonate, bound with a thermo-plastic emulsion. Many artists have painted onto unprimed canvas, such as Jackson Pollock, Kenneth Noland, Francis Bacon, Helen Frankenthaler, Dan Christensen, Larry Zox, Ronnie Landfield, Color Field painters, Lyrical Abstractionists and others. Staining acrylic paint into the fabric of cotton duck canvas was more benign and less
Jack Chambers (artist) Jack Chambers (artist) John Richard Chambers (March 25, 1931–April 13, 1978) was a Canadian artist and filmmaker. Born in London, Ontario, Chambers' painting style shifted from surrealist-influenced to photo-realist-influenced. He used the term "Perceptual Realism" and later "perceptualism" to describe his style. He began working with film in the 1960s, completing six by 1970. Stan Brakhage proclaimed Chambers' "The Hart of London" as "one of the greatest films ever made." Born John Richard Chambers in London, Ontario, Chambers signed his name as John until 1970 and thereafter was known as Jack professionally and posthumously. Chambers spent eight years (1953–1961) studying