Light baking: Light baking is in the middle and late stage of baking. Light roasted beans are lighter in color, stronger in acidity and richer in taste. In addition, chlorogenic acid in light roasted coffee is usually more than that in deep roasted coffee beans, so the slimming effect is better than that in deep roasted coffee beans. Suitable for friends who are slimming and those who like sour taste. Medium roasting of espresso coffee beans with pulp: Medium roasting is the beginning of the second explosion in the roasting stage. Moderately roasted coffee beans are brownish red in appearance, with moderate acidity and bitterness, which is more suitable for public taste. For friends who are new to coffee, moderately roasted coffee beans are a good choice. Deep baking: Deep baking is at the end of the second explosion in the baking stage. Deep roasted coffee beans are dark brown in appearance and have a layer of oil on the surface. The taste will be bitter, without sour taste, and the burnt taste will be heavier. Generally, Italian coffee beans are mostly deeply roasted, which is more suitable for friends who like bitterness.