It’s another Everlasting Formula (pigmented ink), and today I’d like you to meet the Keystone ink that goes by “Ice Age” (almost sounds like a wrestling name, if inks had wrestling names). I’m not sure what I expected from this one, but it gave me some thoughts, looking at the seven Birmingham recipes this ink is part of. Perhaps these pigment inks are used in small amounts in recipes to give them permanence in a particular shade. Most modern fountain pen friendly ink is dye-based, and much of it would be easily removed with water (as opposed to the iron gall inks of the past). We’ll certainly put these inks through their paces in the coming year, and this aspect of ink might have to be one of the experiments of Inkistry 2025.