Blue's the workhorse colour. You need it for headers, diagrams, and the 'this is important' circle around a date. The Artline 509A blue does that job without smudging or ghosting. The 5mm chisel nib puts down dense, clean lines on enamel, porcelain, or melamine boards, and the dry erase ink lifts off with a single wipe. No residue left behind. The alcohol-based pigment keeps the blue rich and readable even after hours of use, and the low odour means it's fine for a packed classroom or a long workshop. Add to cart and stop fumbling for a marker that actually shows up on your board