ChouKuro is the blackest ink ever created from Platinum in its 104-year history! An ink that is blacker than black, and 46.8% darker than Platinum’s famous Carbon Black, this new permanent ink from Platinum is going to set the new standard of what is possible from permanent black ink in the fountain pen market. An intensely rich black, this pigment-based ink is water resistant, fade resistant, and feather resistant.

Note:Cleaning this ink with tap water may cause it to react to minerals in the water and stain your pen. When using this ink, it is recommended to give your pen a good cleaning every 4 to 6 weeks with distilled water.