But let’s back it up a bit and talk about the new collection, then I’ll tell you more about the particulars of the pens. I was sad to see the discontinuation of the Montblanc Patron of Art ...

Changing colors during a 3D print is notoriously difficult ... are as smooth an effortless as this one which uses erasable pen ink to add colors to the filament on the fly. Erasable pen ink ...