A 3ml sample of Robert Oster Signature Charcoal 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. Robert Oster Signature Charcoal fountain pen ink is a softer shade of black.
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Volume - 3ml Vial Material - Plastic Color Group - Black
I like the color of this ink but found that in most pens, it seems to have a flow issue. It gets dry or is intermittent between wet and dry. I'm still doing some experimenting so may find the best pen/nib for it.
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