1.0 Produced in 2007
3.0, 5.0 Produced in 2013
Percentage of Animal Glue：55※
※Amount of animal glue used for 100 ratio of soot.
Transparent and bright bluish-gray black
Not suitable for using as deep ink.
It is suitable for writing calligraphy and for paper called gasenshi.
Since it is for using as light black ink, not suitable for using as deep ink.
As it gets older, the color becomes more distinctive, and it can even be used as very light color by adding more water.