Features:

• The writing of rollerball pens resembles that of a fountain pen.
• They deliver more ink compared to other types.
• They provide comfortable writing and do not leave gaps, but they may smudge.
• Not suitable for low-quality paper and for left-handed users.
• The ink lasts less compared to ballpoint and gel types.
• It has invisible ink that is not visible while writing, but becomes apparent when illuminated, usually with a flashlight.