Does the deep roasting in the shallow roasting of the degree of roasting in coffee have anything to do with the first burst point and the second burst point of baking?
At the Qianjie Coffee Factory, when you come to the baking room, close to the roaster, you can easily hear beans beeping as they are roasted. What do these noises represent? Coffee beans have two opportunities to make a sound when they are heated, which are called "first explosion" and "second explosion" (First Crack and Second Crack).
What is a bang?
This is because of the heat, which produces a large amount of gas and water vapor inside the beans. when the internal pressure cannot hold up, the volume of the beans expands and then bursts. The explosion occurred when the baking temperature was about 196Mel 205 °C. the sound was so loud that it sounded a bit like popcorn, judging that the beans had begun to reach the level of shallow baking. Yega Xuefei's coffee beans are suitable for this light roasting. Between the first explosion and the second explosion, it belongs to medium baking.
What is the second bang?
If the heating continues at this time, a relatively subtle sound belonging to the second explosion will be heard while the temperature continues to rise, and the baking temperature is about 225mi 230 °C. After the second explosion begins, the oil of the beans will surface, that is, the stage of deep baking. Blue Mountain Coffee drinking Brazilian Coffee belongs to this kind of deep roasting. Curious you may wonder what will happen if you continue to bake. Of course, because of carbonization, it finally burned up.
Cooling
Roasted coffee beans must be cooled quickly to prevent self-baking. Professional bean roasting machines on the market now have special cooling trays, but when roasting in large quantities in multiple batches, it is still necessary to pay attention to the change of coffee temperature after roasting.
Static
Roasted coffee beans have different resting time requirements depending on the heating mode of the roasting machine, just like the fried steak, the coffee flavor will be better after the roasting!
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