Why chocolate comes wrapped in foil: The surprising science behind its shiny protective layer

• Image: CanvaFrom luxury truffles to everyday chocolate bars, foil has long been one of the most recognisable forms of chocolate packaging.
• While its glossy metallic appearance adds a premium feel, its purpose goes far beyond aesthetics.
• Chocolate is highly sensitive to heat, moisture, oxygen and strong odours, all of which can affect its texture, flavour and shelf life.