Artline 370 Flipchart Markers Xylene Free Flip chart Marker The Artline 370 range contains specially formulated ink for producing bold clear markings without bleeding through thin porouse surfaces such as paper. Ideal for use with flipcharts as markings will not bleed through onto the next sheet of paper. Contains Drysafe Ink that allows the cap to be left off for up to 2 days without drying out (in controlled tests).