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How is decaf coffee made?

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Generally, decaffeination involves water-logging coffee beans when they're still green (before roasting) so that the caffeine inside can be made soluble, meaning that it can be dissolved.

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The most-common methods of decaffeination involve chemical solvents, usually ethyl acetate or methylene chloride. In the direct method, the coffee beans are steamed and then rinsed repeatedly with the chemical solvent to flush away the caffeine.

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