They are filled with water-based ink that dries quickly

Publishing the best styles across the globe on trains

so you can get a nice flow in your lines

The defining trait of the DR Drawing Pen is permanence: once the pigment-based ink dries on the page

on the run otr 070 hard to buff ink marker 15mm Caster They are filled with water-basedClassic flow pen filled with On The Runs notorious Hard to Buff ink. Permanent alkohol based black ink that adheres really well to nearly all surfaces. Just like all other pens from On The Run, this one is refillable and the tip is easily changeable as well. Check out all pens, inks and other products from On The Run here.