SAILOR Flickering Fountain Pen Ink 20ml Yoi

You can catch a glimpse of different colors in shading and bleeding, and the color changes depending on the passage of time and the paper you write on.
In conventional products, the change in color caused by the use of special paper was the main focus, but with "Flickering Ink" you can enjoy the change even on ordinary high-quality paper. It can be used not only as a fountain pen ink, but also as a dip pen or glass pen to enjoy a wide range of "flickering" color changes.