Rohrer & Klingner Dokumentus ink is the world's first waterproof pen ink that meets the durability requirements of DIN ISO 12757-2.

It has been tested by the Paper Technology Foundation in Heidenau, Germany, an independent standard that has certified that this ink can be used by employees for official documents.

The new technology and high-quality raw materials used for the composition of this pH-regulated ink ensure permanent and archival writing. Writing comfort with a pen was the main priority during the development of this product.

Make sure to place the cap on the pen after use to prevent clogging of the nib. Beyond that, no special care is required.

Rohrer & Klingner ink is available in 50ml glass bottles.

Rohrer & Klingner, based in Germany, was founded in 1907 by Johann Adolf Rohrer junior and his partner Felix Arthur Klingner. Today, the fifth generation of employees maintains the long tradition of ink manufacturing. Following well-established recipes, their products are handcrafted, mainly combining natural binders with corresponding pigments.