This is a much louder and more forceful sound than second crack Second Crack is the second audible clue the roaster-operator receives about the degree-of-roast, following First Crack. What is the difference between first and second crack? While First Crack is driven more by the change from water to water vapor, second crack’s audible snap … Read more
second crack – If the roast continues long enough, coffee will go through a second crack. This is slightly softer sounding than 1st crack and it’s usually when oils will begin to migrate from the inside of the bean to the outside Is second crack louder than first crack? First Crack: This is a much … Read more
The basic answer is around 440 to 455 fahrenheit (external temperature), the buildup of Carbon Dioxide in the bean becomes too great for the increasingly brittle bean structure. Again the expansion causes an audible crack or snap. Is second crack louder than first crack? First Crack: This is a much louder and more forceful sound … Read more