A 3ml sample of Diamine Registrars Blue-Black 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. Diamine Registrars Blue-Black ink is a deep shade of blue black that leans towards black.
Having trouble deciding between colors? Use our Ink Comparison Tool to quickly and easily view different colors side by side.
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