Jamieson, Fausset and Brown on 2 Kings 9:30

30. Jezebel painted her face--literally, "her eyes," according to a custom universal in the East among women, of staining the eyelids with a black powder made of pulverized antimony, or lead ore mixed with oil, and applied with a small brush on the border, so that by this dark ligament on the edge, the largeness as well as the luster of the eye itself was thought to be increased. Her object was, by her royal attire, not to captivate, but to overawe Jehu.