A 3ml sample of Monteverde Hippo Dark Blue fountain pen ink, labeled with the name of the ink brand and color, in a plastic ink sample vial with a dip at the bottom to allow you to easily get every drop. The ink is specially created with Monteverde's Ink Treatment Formula, which prevents the ink from drying out in your pen. This formula also improves both ink flow and drying time, as well as helping to lubricate and protect the ink feed system from corrosion and clogging.
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