This is traditional blue ink (seiboku) for calligraphy. It is a genuine solid ink made by carefully kneading and molding high-quality soot (sumi) and glue (nikawa). It features a deep, bluish-black color and smooth brushstrokes. A poem is engraved on the back with gold paint, making it a valuable work of art. It comes with an antique cloth-covered box, and is in good condition. It is recommended for practicing calligraphy and ink wash painting, as well as for collection. Please purchase only if you understand that this is a used item. Thank you for looking.