For optimal results, we recommend using alcohol-based dyes. Not suitable for acrylic or oil-based liquids.
Refilling is very straightforward: Unscrew the cap, remove the valve, pour in the ink, and once everything is securely fastened again, the mixing balls inside blend the liquid thoroughly. Gently press the tip to release the colour with precision.
Store upright with the tip pointing upwards to prevent leakage.