Hermetic seal

A hermetic seal has the quality of being airtight. In common usage, the term often implies being impervious to air or gas. When used technically, it is stated in conjunction with a specific test method and conditions of usage.

Because compounds that give coffee the flavor and aroma are volatile, roasted coffee beans are stored in airtight recipients. This prevents oxidation of some of the compounds, and volatilization of other compounds.

%d bloggers like this: