①Smudge proof

The ink will not bleed when used with alcohol-based markers and watercolor after the pen line has completely dried.

Compatible with color markers or watercolors.

For Coloring

②Fade Resistant

The ink is archival and will not fade if you erase over it. This is helpful for removing pencil marks from preliminary sketches.

Ink integrity stays preserved after erasing over it 3 times, or 20 times.　

The nibs are sturdy and durable, last a long time.