The raw material of the Carnival of Viareggio is papier-mâché or rather the paper mold. It was invented by the manufacturer from Viareggio Antonio D'Arliano in 1925. Paper mold allowed to build huge works, but light at the same time. Models in clay, plaster casts, newsprint and glue made by flour and water are the simple ingredients of the biggest show of its kind in the world. The philosophy of recovery and recycling through an only manual technique are the basis of the event.