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When Should First Crack Happen? [Solved]
At around 196°C, the beans will emit a cracking sound from within the drum, not unlike the sound of corn kernels popping. This is called “first crack”. At this stage, the beans enter an exothermic reaction, releasing built-up energy, steam, and carbon dioxide (CO2) from their core.9 Feb 2021
Here’s what first crack looks like.
What
Coffee Class: First Crack, Second Crack, Coffee Roasting Development
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Roaster School - Season 2 - Episode 3: From Yellow to First Crack
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