The "MEIJINOIRO" series is a beautiful selection of colored inks which were inspired by popular colors from the Meiji era of Japan. The Meiji era is an era of Japanese history which extended from 1868 to 1912. Each color has a history that originates from that era. It can be used with fountain pens, glass pens, dip pens, Kuretake Karappo-pens, and more. "KUJAKURYOKU" had been introduced by the West during the Meiji era. It is a bright, bluish-green, like the beautiful feathers found in peacock wings. Peacocks have been loved in Japan since ancient times, and it is said that the recognition of the common people increased during the Edo period. 20g/0.71 fl oz