Sour Apple
$15.00
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Sour Apple is part of the Keystone Formula fountain pen ink line, our traditional dye-colorant ink. The 60mL volume will provide approximately 75 standard converter refills assuming a 0.8mL draw. Enjoy Sour Apple as a standalone fountain pen ink, or blend it with other Birmingham Pen Co. fountain pen inks to craft your personalized shade.
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