Kyo-Iro Fountain Pen Ink - Ryokyuuiro ShimmerGreen Glaze Fountain Pen Ink All Kyo No Iro inks are handmade in Kyoto, Japan using traditional dyeing techniques and materials. Ryokuyu iro is a shading pale green color with silver shimmer. Ryokuyu () is one of the oldest glazes, used to create green pottery in China for thousands of years. In Japan, it started being produced in the Heian period (794 1185) mainly to be used for royalty. Kyo No Oto writing inks reproduce traditional Japanese colors