His cast glass pieces make use of the "lost wax" method. I was going to describe the technique but to do it justice is to take too much space. Essentially a wax model is made, cast and then molten glass is poured into the cast. But it is more involved than that! Go HERE for more info.
Africano is also a painter. His work from the 70s was inspired by literature and also included wax reliefs of events from his life.