How does the First World War affect the Revol company? The factory is requisitioned by the army to manufacture parts made of acid-resistant sandstone for gunpowder works. This capacity of resistance had been recognised as early as 1801 at the Exhibition of the products of French industry. The workers are now called back from the front to return to their posts at Revol: this time, however, they’re manufacturing entirely different products. While this is going on, a number of satirical ceramic pieces are made, such as this bomb-shaped piggy bank, the model of which is registered in 1915.