Platinum makes some of the best high-capacity ink cartridges on the market. The cartridges are sturdy and tend to resist evaporation, working well with Platinum’s signature “slip and seal” cap mechanism to prevent your pen from drying out. Note that these cartridges use a proprietary format, and will only fit Platinum Pens.

In addition to standard inks, Platinum makes Carbon Black and Pigment Blue, which feature a pigment-based formulation that is highly water-resistant and suitable for use by artists and anyone who may want additional permanence. Though these inks are intended for use in fountain pens and therefore “safe”, for best performance and to avoid clogging be sure to clean your pen thoroughly prior to changing inks as pigmented inks often to do not mix well with other types of ink.

Cartridges are sold in boxes of 4 (Carbon Black) and 10 (Pigment Blue). Made in Japan.