VOICED : New bells for Notre Dame cathedral

The video tutorial explains the process of casting new bells for Notre Dame Cathedral, replacing those given by Napoleon. It covers the heating of the oven using wood and coal, reaching temperatures of 1080 degrees Celsius. The process involves mixing tin, bronze, and copper, and using molds made from wax, soil, goat hair, and horse manure. The molten metal is poured into molds, with impurities rising to the top, ensuring a pure metal. The goal is to recreate the sound of the original 17th-century bells, unheard since the French Revolution.

How does the density of bronze affect the casting process?

What happens to impurities during the melting of the metal?