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. Meiji era is also called "the purple era" because "purple" or "light purple" was often used in women's clothing as a chic or cool color. "Purple" has been one of the trendy colors since the Meiji era. 20g/0.71fl oz