Artline 90 Permanent Markers have the brightest ink to ensure that anything you write stands out and pops out of the Board. Artline has a non-offensive low odour,xylene free, waterproof and provides dense bold colours with quick dry. Suitable for use on cardboard, wood, steel and glass. Artline Permanent markers offer a fun and contemporary design with leading functionality.it is highly recommended to use a high-performance Artline Permanent marker. The Artline Permanent Markers an ergonomic shape, smooth and gleaming barrel design for comfortable grip. This Black Colour Markers feature a 5.0 mm nib for smooth flow from the beginning to the end.