Mont Marte Canvas 380Gsm 1.55Mx30M Primed Roll. Mont Marte Canvas Primed roll 380 SGM on the roll offers artists the flexibility to create artworks of any size. It is also perfect for creating backdrops, murals, and banners. This canvas is strong and offers a uniform medium weave texture. Canvas on the roll offers artists the flexibility to create artworks of any size. It is also perfect for creating backdrops, murals, and banners. This canvas is strong and offers a uniform medium weave texture