Weight Loss During Coffee Bean Roasting: How Much and Why?

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How much weight do coffee beans lose during roasting?

Coffee beans typically lose about 15-20% of their weight during roasting. This is due to the evaporation of moisture and the release of gases.

Why do coffee beans lose weight during roasting?

Coffee beans lose weight during roasting because of the Maillard reaction, which is a chemical reaction that occurs when sugars and amino acids are heated. This reaction produces new compounds that give roasted coffee its characteristic flavor and aroma. The Maillard reaction also causes the beans to lose moisture and release gases.

Does the type of roast affect the weight loss of coffee beans?

Yes, the type of roast affects the weight loss of coffee beans. Darker roasts typically lose more weight than lighter roasts. This is because darker roasts are roasted for a longer period of time, which gives the Maillard reaction more time to occur.

How can I minimize the weight loss of coffee beans during roasting?

There are a few things you can do to minimize the weight loss of coffee beans during roasting:

  • Use a lower roasting temperature.
  • Roast the beans for a shorter period of time.
  • Use a roasting method that is less aggressive, such as air roasting or drum roasting.

What are the benefits of roasting coffee beans?

Roasting coffee beans has a number of benefits, including:

  • Developing the flavor and aroma of the coffee beans.
  • Making the coffee beans more soluble, which makes them easier to brew.
  • Extending the shelf life of the coffee beans.

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