Simply the BEST pen for art journaling. We kno because we've tried the others!
This pen is amazing and it's the only white gel pen we use in our art journaling classes. It writes on just about anything!
 
Ultra smooth ink flow with a bold tip. 
Visible ink supply. Refillable.
Acid free.
Barrel design with rubber grip provides comfort and control in writing.
Size: 1.0mm.