ART ALTERNATIVES PRIMED CANVAS PANELS 14”x18” These canvas panels are designed for use with all media, and are of archival quality. The 7 oz. canvas is 100% cotton, triple primed with acrylic gesso and securely glued to a 100% recycled, acid-free board. All canvas sides wrap around and are secured in place on the back side. The convenient label provides an area to identify the artist, title, medium, etc.