Cornelissen Historical Inks, Sir Isaac Newton Ink 30ml

Formulated to the exact recipe used by Isaac Newton, this ink is completely permanant, as his surving writings attest. Although composed of very similar ingredients to our Jane Austen Ink, we consider Newton's recipe to be superior, as Austen's has browned slightly over time. Initially a medium blue-grey, it darkens to a rich, matte back, which is slightly warmer in tone than our regular Oak Gall Ink. It is made in small batches and blended to give the required consistency and strength, and is fully waterproof in 5-7 days. Permanent and lightfast, it has been steeped for several weeks and left to ‘mature’ for several more in the bottle. When used on animal skins such as vellum, the acids in the Oak Gall Ink react with collagen, effectively ‘etching’ itself into the surface, hence its permanence.