Sumi Ink - RedRed Japanese Sumi ink creates the perfect accent for any calligraphy work of art. Made from high-quality vegetable oil soot. Economical and eliminates the need for grinding. Non-Toxic. Imported from Japan. Available in 5 oz size. This Japanese Sumi ink is perfect for signing your name to your finished brush work,for ink drawing or stamping your work with your custom chop.