Two other methods use water. The Swiss Water method sees the beans soaked with water; the caffeine rich solution (full of flavours) is then strained though activated carbon which...MásTwo other methods use water. The Swiss Water method sees the beans soaked with water; the caffeine rich solution (full of flavours) is then strained though activated carbon which captures the caffeine. Starting in Switzerland in the 1930s, the process was first used commercially in 1979. It gained favour because it was the first decaffeination method not to use solvents.
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