Private Reserve has developed a new, archival-quality fountain pen ink to preserve written documents, signatures, designs, artistic items, and other renderings to last as long as the paper upon which they appear.

This new ink has been tested at length, and the results have been impressive. The ink is light-fast and has a super-fast drying time with no feathering. It is easily cleaned from a converter, leaving behind no residue. The Invincible Aqua Blue is bottled in a cobalt blue ink bottle.