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 certification body, which has confirmed that this ink can be used by secretaries for official documents.

The new technology and high-quality raw materials used in formulating this pH-regulated ink ensure permanent and archival writing. Writing comfort with a pen was the main goal in developing this product.

Note that you need to cap your pen after use to avoid clogs in the nib. Beyond that, no special care is required.

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

Rohrer & Klingner 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 the company in ink production. Following established recipes, their products are handcrafted, mainly combining natural binders with respective dyes.