The Uni-ball one applies the newly developed "Uni-ball One" ink. The pigment in "Uni-ball One" ink minimizes the penetration of the ink into the paper fiber. As a result, it develops original colors on paper, showing a darker black than an ordinary black ink pen and more vivid colors than other colored ink pens.
The barrel design is stylish and straightforward. It features a metal oval-shaped clip that can be easily clipped onto your notebook or pocket. The joint part of the clip matches its ink colors.
According to research by Ritsumeikan University in Japan, the darker and sharper the letters in black, the easier they are to remember. So the Uni-ball one gel pen in black ink might become your best tool when studying.
This set includes eight colors: Black, Blue, Red, Blue Black, Green, Orange, Pink, and Sky Blue.
Compatible Uni-ball One Gel Pen Refills - 0.38 mm / 0.5 mm are available in five colours: Black, Blue, Red, Blue-Black, and Orange.