Are coffee beans afraid of the sun? What effect does light have on coffee beans before and after roasting?

Coffee beans are seeds picked from coffee trees. After a series of processing and roasting, they become the coffee we know as coffee. In this process, light plays an important role for coffee beans.

First, let's see if coffee beans are afraid of the sun during the drying process. In fact, a moderate amount of sunlight is good for coffee beans. When freshly picked, coffee cherries are usually placed in an open field for natural fermentation and drying. Sunlight can help accelerate water evaporation and promote internal material transformation and flavor formation. However, exposure to extreme heat or strong sunlight may cause overdrying and loss of aroma.

Secondly, it is also important to maintain appropriate light conditions before roasting. During storage, avoid exposing unprocessed or unpackaged green beans directly to sunlight or strong light for a long time. This is because it will cause the green beans to be exposed to ultraviolet radiation, accelerate oxidation reactions, and cause the quality of the beans to deteriorate. Therefore, coffee beans should be placed in a dark, dry, and ventilated environment during storage.

Finally, light also has an effect on the coffee beans during the roasting process. When the coffee beans enter the roaster, the entire process is controlled by adjusting the temperature and time. However, in some special cases, such as when performing light roasting or special treatments, light may be used to assist in controlling the temperature and achieving the desired effect.

In summary, a moderate amount of sunlight is beneficial to coffee beans, helping to evaporate moisture and develop flavor during the drying process. However, during storage and before roasting, care should be taken to avoid long-term exposure to strong light to maintain its quality. Therefore, pay attention to appropriate light conditions when handling and storing coffee beans.