Sumi Ink is formulated for sumi painting and calligraphy
It is a permanent, black ink made from quality vegetable oil soot, formulated especially for sumi painting and calligraphy.
Sumi ink dries more matte than India ink does. Dry India ink has this shiny, almost plastic-like sheen to it when it dries. Sumi ink is nice and flat, without any shine. However, this is a very subtle difference