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
Jackson Pollock accident"; he usually had an idea of how he wanted a particular piece to appear. His technique combined the movement of his body, over which he had control, the viscous flow of paint, the force of gravity, and the absorption of paint into the canvas. It was a mixture of controllable and uncontrollable factors. Flinging, dripping, pouring, and spattering, he would move energetically around the canvas, almost as if in a dance, and would not stop until he saw what he wanted to see. As another important influence can be cited Wolfgang Paalen's article on "Totem Art" of the indigenous