Hermetic seal

A hermetic seal has the quality of being airtight. In common usage, the term often means being impervious to air or gas. When used technically, it is stated in conjunction with a specific test recipe and conditions of usage. Because compounds that give coffee the flavor and aroma are volatile, roasted coffee beans are stored […] This dictionary word firstly appeared at The Dictionary of Coffee Terms, a website publishes and maintains a free online coffee and espresso related Dictionary.
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