Uranium glass of uranium glass is pale yellowish-green, which in the 1920s led to the nickname vaseline glass based on a perceived resemblance to the appearance of petroleum jelly as formulated and commercially sold at that time. Specialized collectors still define vaseline glass as transparent or semi-transparent uranium glass in this specific color. Vaseline glass is now used as a synonym for any uranium glass, especially in the United States, but this usage is not universal. The term is sometimes carelessly applied to other types of glass based on certain aspects of their superficial appearance in normal light, regardless of actual uranium
Vaseline incident means of altering the ball's condition, such as applying Vaseline, were banned. Lever, and his bowling partner Bob Willis, both found themselves suffering from sweat falling into their eyes. It was suggested, naively, by the team physiotherapist that they apply strips of gauze covered with Vaseline above their eyes to divert sweat from their forehead away. In play these were found to slip, and Willis removed his. Eventually Lever also removed his and lay the gauze on the ground near the stumps where it was noticed by the umpires and Indian team, but not before he had used sweat from