Product Name: Blue Ink "Seihin" Manufacturer: Kobaien Features: This blue ink is made with oil soot developed through years of experience, high-quality glue, and genuine indigo (pure indigo from India). It has a very strong blue hue, resulting in a predominantly blue ink color even when used in a thick concentration. Uses: Suitable for calligraphy, sumi-e (ink wash painting), and haiga (haiku painting). This is an old ink stick. It has been used to some extent. The exact amount used is unknown. Please refer to the photos for condition. #calligraphy #blueink #Kobaen #calligraphysupplies #ink