The printer lays down layer after layer of a special fine plaster powder—eventually
filling a well about the size of a half gallon of ice cream. On top
of each layer, the printer puts down colored water in a pattern resembling
the cross-section of the physical model on that plane. A fresh layer
of powder goes on top of that, and the printer lays down the pattern
in colored water for the next cross-section. In this way, the layers
are built up with the water binding each layer together.
