Coffee roasting is a process of heating coffee beans to change their physical and chemical properties. The three different levels of roasting are light, medium, and dark. Each level produces a different flavor profile, with light roast coffees being the most delicate and dark roast coffees having the strongest flavor. The length of time that coffee beans are roasted also affects the flavor. Light roast coffees are typically roasted for a shorter period of time than dark roast coffees. This results in a coffee that has more of its original flavors intact. Dark roast coffees are roasted for a longer period of time, which brings out more of the roasted flavors and often results in a coffee that is less acidic.