Rohrer & Klingner Dokumentus Hellblau (Light Blue / Cyan Document Ink) iron gall ink Whether you're traveling light or

Whether you're traveling light or layering gear

it is pH-neutral and therefore safe in all kinds of vintage fountain pens

with a smooth steel nib and standard international short cartridge compatibility

Whether you’re journaling

Rohrer & Klingner Dokumentus Hellblau (Light Blue / Cyan Document Ink) iron gall ink Whether you're traveling light orDokumentus Hellblau is a light blue (cyan), permanent document ink. Rohrer & Klingner's "Dokumentus" line of document inks is a DIN ISO 12757 2 certified document ink which means it's permanent: waterproof, UV resistant lightfast, bleach resistant, ammonia resistant, sulfuric acid resistant, and more. Basically, the paper you write on will disintegrate long before this ink does. Made in Germany.