Sumi Ink Stick JapaneseMake your own Sumi ink with this with high quality Sumi Ink Stick. For over one thousand years, the method of making sumi sticks has remained the same. Pure pine soot mixed with select vegetable oils is molded and dried to form a solid block which, when ground on a suzuri stone with water, turns to ink. Each Sumi ink stick measures approximately 2" in length. Imported from Japan.