Platinum Ink Cartridges - Blue Black

Pack of 10 SPSQ-400 ink cartridges for all Platinum fountain pens including Preppy.

*Color note: Platinum's 'Blue-Black' is actually a fairly standard medium blue, not the very dark blue usually associated with this term; however, it is an iron gall-based ink, so care should be taken when using it in fountain pens without gold nibs. This has the added benefit of making this ink permanent, and the color will change over time from blue to black.

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Pack of 10 ink cartridges SPSQ-400 for all Platinum fountain pens including Preppy.

*Note on color: Platinum's 'Blue-Black' is actually a fairly standard mid-blue color - not the very dark blue more usually associated with this term - it is an iron gall based ink though so care should be taken when using in fountain pens without gold nibs. This does have the added bonus of making this ink permanent and the color will change over time from blue to black.