Description

precise machining

Octopus Fluids Ultramarine Blue ("Ultramarinblau") fountain pen ink is a vibrant

If you like changing inks often

oak-barrel swirls

Octopus Fluids - Document Ink, Blue (30mL Bottle) blue ink precise machiningThis is Octopus Fluids' Blue document ink: a DIN ISO 12757 2 certified document ink that has withstood tortures (water, UV exposure, bleach, other common chemicals used for forgery) that would make other inks blush. Or fade. If you need an ink that will outlast the paper it's written on, you want a Document ink like this one.

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