In Limoges, the porcelain maker René Frugier, an engineer from the École Centrale, developed a fireproof porcelain that he called "aluminite" because it contained 65% kaolin, whereas a classic paste contains 50%. Fired at 1430°C, it resisted temperature differences and presented multiple qualities (inalterability, shock resistance, ease of cleaning...) which justified its use for cookware. This technical success earned him a silver medal at the 1900 Universal Exhibition.