Platinum ink cartridges are a clean, fuss-free way to keep your Platinum fountain pen writing. Each cartridge holds approximately 1.0 ml of dye-based ink — an above-average capacity for a fountain pen cartridge — and is built sturdily enough to resist evaporation well between writing sessions. The tapered body features Platinum's distinctive ball-bearing closure, which seats deeper into the pen's feed than most cartridge formats and creates a snug, near-leakproof seal.

To install, push the ball-bearing end firmly into the pen's section until you feel it click into place and the ink begins to flow. The cartridge will sit deeper than you might expect — this is intentional, and is what gives the format its reliable seal. It works particularly well alongside Platinum's slip-and-seal cap mechanism, helping to keep the pen fresh even after longer gaps between use.

Please note that Platinum cartridges use a proprietary format and are not compatible with standard international cartridge pens. Each pack contains two cartridges.

Features

• Approximately 1.0 ml of ink per cartridge — above average for a fountain pen cartridge
• Proprietary Platinum format — compatible with all Platinum fountain pens
• Tapered body with ball-bearing closure for a snug, near-leakproof fit
• Sturdy construction with good resistance to evaporation
• Works with Platinum's slip-and-seal cap mechanism
• Dye-based ink formula
• 2 cartridges per pack
• Non Waterproof
• Made in Japan

See all inks and refills