We recommend it dark. Press as soon as the ink becomes fade! A straight liquid writing system with a fresh, vivid writing that lasts as long as possible. Display window for visible ink levels
After the ink becomes diluted, a few push cycles will restore the ink to a vivid writing without any fraying. The back of the pen is pushing rather than a nib, so the pen tip is less likely to scratch and the width of the pen is not too thick. Display window for visible ink levels
Ink color/blue
Line width/fine round core, 0.06 inch (1.6 mm)
Ink Type: Oil-based alcohol based ink
Specifications: Push-refresh method (rear knock type).
Specifications: Disposable type
Units (quantity) / 1 pack (5 pieces)
Manufacturer Part Number: EMWLS-C x 5