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
Lizzie Dripping set entitled "Lizzie Dripping The Complete Series One & Two", listed in some sources as "Lizzie Dripping & Lizzie Dripping Rides Again" (Originally listed by the BBC in 1975 as "Lizzie Dripping Again", though the word "Again" was omitted from the opening title caption of the episodes, which remained in the original series one format of "Lizzie Dripping and ..."). All nine episodes of the series are included in the set, but the Jackanory Playhouse original episode is not, presumably because it has been wiped. While an adaptation of the 1973 series appeared at the conclusion of the broadcast of