Animation style characterized by visible heavy black borders around characters and objects. This style began being used by a few animation companies in the early 1950s (mostly UPA, of Gerald McBoingBoing and Mr. Magoo fame), and became dominant in American TV animation during the 60's and 70's, eclipsing the more naturalistic style used in most animation during earlier decades. It was phased out during the early 80s, when more naturalistic styles again became dominant in American animation, but then became the standard yet again (on television at least) during the late 90s, and so it remains to this day. Shows animated in Flash tend to look good in this style.