Kyo-Iro Fountain Pen Ink - SeihekiMuted Turquoise Fountain Pen Ink All Kyo Iro inks are handmade in Kyoto, Japan using traditional dyeing techniques and materials. A muted blue green color. The name of the color is derived from the ancient Chinese jade stone "Seiheki", and it was used habitually for clothing and accessories. In ancient times, it was used as the color of the clothes of monks and nuns. "Kyo no Oto" is a series of writing inks that reproduce traditional Japanese colors