The new ink, Chou Kuro, whose blackness has been proven by numerical values, offers a bright and intense black color, and allows notes to be preserved permanently. It is made with pigment particles that react with the mineral content of the paper as you write. It doesn't bleed, is water and fade-resistant, and is ideal for writing anything you want to keep for a lifetime. It is special ink but take a look at @inky.rocks video and all will become clear. Enjoy!
Note: the luxury boxes are no longer available. Soon the bottles will be back in stock.