Changes of raw beans during baking

Many people think coffee beans are born dark brown. In fact, raw coffee beans are green or cyan, because they also contain a certain amount of water. From the color of raw beans after observation, the general color green for the new beans, yellow or white color for the old beans.

After the coffee fruit has been processed and selected, it will be graded into sacks. And then, mostly by ship, dispersed around the world. Then coffee traders carry out agent distribution, distribution to coffee factories, coffee roasting studios and their own roasting cafes, coffee beans are transported to coffee factories, through professional roasting machines for roasting processing, if not this process, coffee beans are only a green crop, and coffee beans more than 500 kinds of aromatic substances, also need to be roasted to wake up, will be emitted.

Coffee beans in the process of being roasted, a series of chemical changes will occur, the color of coffee beans will gradually change from light green to dark coffee, after 8-20 minutes of roasting, light green coffee beans will begin to gradually dehydrate, turn yellow.

The coffee beans will start to swell, doubling in size and becoming fluffy. After this series of processes, green coffee beans will begin to turn brown, which is common to us. When the roasting reaches the roasting depth we need, we need to cool the coffee beans quickly by cold air so that we can stop roasting in time.

Coffee taste exquisite, in fact, more decisive factor lies in the roasting this link. The different cooking time decided by the roaster determines the taste of this coffee to a certain extent.