Sumigraphy - Calligrapher's Ink (Sumi)

The ink stick, sumi, is a stick of specially treated handmade material (soot, glue) that is combined with water and ground on the ink stone, suzuri, to produce luminous black ink. The fresh ground ink has many properties that make it superior for this art from than the modern bottled ink.

for more details: https://www.sumigraphy.com/