『uni-ball one（ユニボール ワン）』 differs from ordinary gel ink in that it uses new pigments that minimize the penetration of colored materials into the paper fibers.
This lets the colorant on the surface of the paper reveal its original color, deeper blacks and more vibrant colors, making it easier to write memorable, clear and precise letters.
〃Ink Color
Blue Black / Pink / Red / Orange / Green / Sky Blue / Blue / Black
