Oil-based Ink Ballpoint Pen 0.7mmSTALOGYs Oil based Ink Ballpoint Pen 0. 7mm uses a low viscosity, oil based ink that provides a smooth writing experience. The formula of the ink was originally ill suited for writing Japanese, with its stop and hook strokes. After finding just the right viscosity, the pen now accommodates both writing in roman languages as well as Japanese. The body of the pen is made of non slip material, ensuring a comfortable grip while writing. At Misc Store we