The calligrapher's art set contains four main tools. 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. The calligraphy brush, fude, is composed of two layers of hair and should be sharp, resilient and respond quickly to the artist's touch. The rice paper, washi, that we use for Sumigraphy™ is handmade and laminated to a hard board backing and edged with a strip of gold paper. Once the artist is satisfied with his work, he carefully stamps the work with his personal seal, called a "hanko", in traditional red ink. See how Master Keisui uses these tools to create Sumigraphy™.