Amatruda
Handmade in an Amalfi, Italy mill since the Middle Ages, Amatruda Paper makes an impression. I'm convinced that if I eventually receive an inexplicably-delayed acceptance letter to Hogwart's School of Witchcraft & Wizardry it will be on this paper. Its limpness almost conveys the idea of cloth, and it is surely what any self-respecting pirate would draw her or his treasure maps on.