The unique dry safe ink formula allows the cap to be left off for up to 48 hours without drying out (In controlled tests). The alcohol based pigment ink in the artline 579 has a non offensive low odour and provides dense bold colours Low odour alcohol based ink. Pigment based ink for bold colours. Dry safe ink allows cap off time up to 48 hours without drying out. Suitable for use on electronic whiteboards. Ink is xylene free and rohs compliant. Chisel nib with 2 - 5mm line widths.