Excellent refill. Uni-ball...
September 22, 2011
Excellent refill. Uni-ball Signo ink is put into the ballpoint. Note that, Signo
ink contains check fraud protection, as per Uni-ball's website. I submerged a
sheet of paper with a written sample in alcohol, bleach, and boiling hot water:
the tests passed and the ink remained. We need D1 refills now. Smooth writers