Noodler’s 'Bulletproof' Ink Series
The Bulletproof Series is Noodler's flagship range and is a ph neutral, non-corrosive fountain pen ink which is permanent when on paper. A chemical reaction takes place between the ink and an ingredient in paper to make it permanent. It is not permanent, however, on your hands, clothes and a desk. The inks are also resistant to water, UV light and chemicals and acids.