Ballpoint pen ink does not bleed due to the power of ions
The ink of the water-based ballpoint pen was a cause of bleeding easily and smearing the notebook when the highlighter pen was pulled from above. This time, a new ingredient is added to the highlighter pen to suppress bleeding with the power of ions.
A soft nib that fits on the paper
Nylon, a soft material, is used for the pen tip, and it bends to fit the paper surface. Since you can draw lines with a uniform force, you can easily mark curved surfaces of thick reference books.