Brush Pens Brush Tip Pen. Traditional Japanese calligraphy calls for the use of a brush and India ink, rather than a nib, for proper execution. To meet the need of a writing instrument that maintains this quality of expression yet is portable, Pentel developed the cartridge refill brush pen and has become the acknowledged leader in this field. The precise flow of ink and the accurate resiliency of the bristles make our brush pens a most satisfying alternative, given the limits inherent in the materials. Original Brush Pen Colour Brush Pen Metallic Brush Pen