When artists talk about canvas, this is a rather generic term to describe the support for a painting. Choosing the right type of canvas for your artwork depends wholly on your budget, the type of painting you’re creating, as well as your comfort and familiarity. Canvas can vary in types, including cotton duck (the most common), linen (more expensive) and watercolor canvas rolls. Beyond those choices, an artist must also consider whether he’ll buy prestretched canvas (or stretch his own) before he or she begins their masterpiece. Cotton duck canvas roll. Despite its name, cotton duck canvas has nothing to do with ducks. It comes in a variety of weights…