Ballpoint pen with ultra-low-viscosity Mach ball ink. Ultra-fine .5mm line, black ink. Click (knock) type

Green or Ecru

Ballpoint pens in the past used "sticky" ink, but Anterique's oil-based ballpoint pens use "ultra-low-viscosity ink" (Mach ball ink). Ultra-low-viscosity is ink that is "smooth" and easy-flowing like salad oil. When using "smooth" ink, an ordinary pen tip will have ink leakage, so it must be combined with an precisely processed pen tip. Anterique ballpoint pens use a pen tip with a built-in spring to precisely control the flow of ink for a very crisp, non-smudging, ultra-fine .5mm line.  This is the secret to smooth writing!  Made in Japan.