"OTR .984 is super permanent alcohol-based high-quality ink. Optimized for the ON THE RUN FLOWPEN OTR .084 & 184 and On The Run SOULTIP squeeze markers, this ink works perfectly with a wide variety of painting and writing instruments. Multi-purpose use! For indoor & outdoor use.  Works on paper, metal, plastic, glass, and stone. Can be used on canvas, walls, mixed media, and many other surfaces. Best on smooth and dust-free surfaces! Use the OTR.984 with alcohol-based ink markers, pump action valve markers, brushes, air brushes, or any mop & squeeze marker, etc."

– On The Run