Yasutomo water-soluble sumi ink is a great choice for calligraphy or drawing projects with dip pens and brushes. It dilutes easily to create beautiful gray tones, works well with dry brush techniques, and dries to an opaque, matte finish. It's also certified non-toxic by the Art and Creative Materials Institute. Available in two sizes, 59 mL and 177 mL, both in squeeze bottles. Made in Japan.