The roasting process of roasted coffee.

Coffee processing

Roasted coffee beans

Peeling

Remove the peel and most of the flesh by mechanical, manual, or other means.

Ferment

By removing the mucus and film outside the core by fermentation, each manufacturer has its own fermentation time because the length of fermentation time will affect the flavor of coffee.

Dryness

The drying method is mainly divided into natural sun drying and natural air drying. Too high water content can easily cause mildew and worms of raw coffee beans. High water content can also cause high acidity of coffee.

Baking

Through roasting, raw coffee beans can release the special aroma of coffee, and each coffee bean contains its aroma, sour taste, sweetness and bitterness.

From raw beans, light roasting, medium roasting to deep roasting, the water is released again and again, the weight is reduced, but the volume slowly expands, the color of the coffee beans deepens, the fragrant oil is gradually released, and the texture becomes crisp. In raw beans, there is a lot of chloric acid, which disappears with the baking process, releasing familiar and pleasant fruit acids such as acetic acid, citric acid and malic acid in wine.

Shallow baking: when the beans make the first light sound, the volume expands at the same time, and the color changes to a delicious cinnamon color. Acidity dominates the flavor of shallow roasted beans, texture and taste have not been brought into full play, generally used as canned coffee.

Medium roasting: coffee beans show an elegant brown color. This method of baking is also called city roast. Medium roasting can not only preserve the original flavor of coffee beans, but also moderately release aroma, so the blue mountains of Jamaica, Colombia, Brazil and other individual coffee, more choose this roasting method. At 20 minutes, the oil begins to surface, and the beans are burned to a bright dark brown, called full-city roast, when the sour, sweet and bitter taste of the coffee reaches the perfect balance.

Deep roasting: the darker the color of coffee beans, the sweeter the flavor, when the oil has turned into caramel, bitter back to sweet, endless aftertaste, the most suitable for brewing strong Italian espresso Espresso style coffee, so it is also called Italian roasting. People who are sensitive to caffeine might as well choose deep-roasted beans, because in the process of deep-roasting, caffeine will slowly escape, so the deeper the roasted beans, the lower the caffeine content, and the caffeine content in a cup of espresso is only half that of other medium-roasted coffee.