The violins performed at the workshop of Nicola Stradivari (1644-1737) in Cremona have always been considered the best in the world. Many luthier and experts have analyzed these violins and have argued for various reasons of the special quality of the instruments: the use of varnish, the subsequent drying or, simply, the good hand of the craftsmen who worked in the workshop.
Recently, a chemical experiment reveals that Stradivarius's secret is in wood. It seems that the violins of the time were made with polycled wood, but in the Stradivari workshop it was proved that the wood was not sick. According to chemical studies, to avoid the cistern truck, artisans used the insecticide that sold them the local apothecary: the salt of stone. Unintentionally the authors, the substance crystallized in wood and, as a result, the violins produced a cleaner and more beautiful sound.