Winsor and Newton Artist's Canvas Boards are ideal for all artists, from beginners to professionals who want to get the maximum impact out of their work. They are stretched by hand for correct tension with tailored corners and are triple coated with one coat of acid free sizing and two coats of highly pigmented primer. Ready primed, the medium grain canvas can be worked on with no prior preparation and are perfect for use with oil, water mixable oil, acrylic and alkyd paints. Their size makes them perfect for painting on the go. Ready primed, they have a great tooth and are sure to make your work look great.