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
Portrait of the Artist Holding a Thistle Portrait of the Artist Holding a Thistle Portrait of the Artist Holding a Thistle (or "Eryngium") is an oil painting on parchment pasted on canvas by German artist Albrecht Dürer. Painted in 1493, it is the earliest of Dürer's painted self-portraits and has been identified as one of the first self-portraits painted by a Northern artist. It was acquired in 1922 by the Louvre in Paris. Dürer looks out at the viewer with a psychologically complex but rather melancholy and reserved, serious minded, facial expression. During the 15th century, thistles were symbols of male conjugal fidelity. In 1493, Dürer was