After the experiments are finished, the effects of the different bubble-removing components to reduce the foam height of the frothing system are measured.

George, making his first appearance on a royal Mail stamp, had to stand on four foam blocks bound together with tape so his head was at roughly the same height as the seated royals.

For the smelting reduction in iron bath, the foam should be kept in a suitable height in order to obtain a high rate heat transfer and reaction.