ANTIBUBBLE

An antibubble is the opposite of a bubble. A soap bubble in air is a thin film of liquid surrounding air. An antibubble in liquid is a thin film of air surrounding liquid... Note that an antibubble is different than an ordinary air bubble in liquid. An ordinarry air bubble is simply some air surrounded by liquid. An antibubble has liquid inside and outside. They form when a "boule" or water droplet presses through the surface with a thin coating of air. This is nicely illustrated to the right in the drawing from Chang.