The mostwidely  used and recommended ink for calligraphy,suitable for practice, comissions and working on multiple surfaces. Must have in every tool kit. 
Water based Pigment, Waterproof after dry.
It's smudge-proof though when dry. * It is very popular for Manga Illustration.
The Ink can be applied with Brush or Dip Pen.
It's good for calligraphy as it's quick drying with a matte finish.
It's pigmented so you should not use it in fountain pens. Made in Japan .