Talk:The Oraculum/@comment-16533050-20161102174555/@comment-16533050-20161103082417

The most common ink used in Medieval times was something called iron gall ink. It was a combinations of iron vitriol, or ferrous sulphate, and oak galls mixed with wine, water or vinegar.

(In case you're wondering, plant galls are abnormal outgrowths of plant tissues, similar to benign tumors or warts in animals. They can be caused by various parasites, from fungi and bacteria, to insects and mites.)

However, as the Dishonored game universe is closer to our 19th century, the ink is probably something similar to Stark's ink and no, not Tony Stark from the Iron Man movies/comics. :p

Squid ink is something rarer.