Museum-quality mount or passepartout from market-leader Canson Our mounts from Canson are completely free from both acid and lignin and have the highest conservation properties according to ISO 9706 This standard ensures durability and a long lifespan Mount Super White puts the image at the centre of attention with its super white colour and white bevel drawing the eye to the image A white mount also gives an airy and elegant quality to your framing These mounts fit in all the frames we sell - just remember to match the outer dimensions of the mount with the size of the frame