Rohrer & Klingner Dokumentus Waterproof Fountain Pen Ink, Dark Blue, 50 mlDokumentus is the world's first fountain pen ink conforming to the resistance requirements of DIN ISO 12757-2. It has been tested by an independent standards body (Papiertechnische Stiftung Heidenau) and certified that this can be used by registrars for official documents.New technology and high quality raw materials used to formulate this new pH-adjusted ink guarantees permanent and archival writing. Comfort of writing with a fountain pen was the main focus of this new product development. 50 ml bottle (about 1.7 ounces). Rohrer & Klingner writing inks are suitable for all fountain pens, quill pens and calligraphy utensils.
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Rohrer & Klingner have been making ink since 1892, and by hand, too, using well-established recipes. Their Document ink is permanent and archival, and is guaranteed suitable for use by registrars for official documents. It is suitable for use in fountain pens; Rohrer & Klingner advise that the only care needed is to ensure that the cap of the pen is replaced when not in use, to prevent nib blockages. Each bottle contains 50ml of ink.
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