The Science of Coffee cover image

4) Espresso Technology

The Science of Coffee

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The History of the Carrema Coffee Machine

When you grind coffee fine enough and you have enough pressure, Carrema is formed. And a good foam needs surfactants - more on that in the next episode. Highland began his barista career using these sorts of lever machines. He once had a very near miss with one which popped up and scratched his hair. But to me, that's a minor problem compared to this machine's biggest liability. It's 200 pounds of pressure. It's like getting punched.

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