Anaerobic vs carbonic maceration: what the bag is (and isn’t) saying

On specialty bags, "anaerobic" and "carbonic maceration" often sit next to washed, honey, or natural. They sound precise. In practice they describe a fermentation stage more than a finished recipe. Anaerobic, borrowed loosely from wine talk, usually means the coffee spent time in a sealed vessel where oxygen was limited — tanks, barrels, or bags with a one-way valve. It does not tell you whether the fruit was still on the seed, how long it sat, or how warm the tank ran.

Carbonic maceration is the narrower label. It usually means whole, intact cherries in a sealed tank flushed with carbon dioxide, so fermentation starts inside the fruit under a CO₂-rich atmosphere. After that stage, the lot can still be washed, dried as a natural, or finished another way. So "CM" is not a third column beside washed / honey / natural; it is an extra step that can sit in front of those paths. When a bag only says anaerobic, ask whether the cherries were whole and whether CO₂ was added — or treat the word as "sealed-tank ferment" and stop there.

Cup outcomes swing with time, temperature, microbes, and how clean the station keeps the tanks. Some sealed-tank lots taste bright tropical fruit; others skew boozy or muddy when control slips. A research-minded read treats the process name as a clue about oxygen management, not a promise of "winey" or "candy" notes. Variety, altitude, and cherry ripeness still do most of the heavy lifting.

Next time the label shouts anaerobic or CM, read it with the rest of the line: origin, variety, and the classic process word that follows. If the shop can say whole cherry or depulped, hours, and tank temperature, you have a real story. If not, enjoy the cup on its own terms — the fancy word was only half a sentence.