Where does this come from, and can I check it?

Pressurised water pushes through a packed bed of coffee in about thirty seconds. The figure is taken from Institute of Food Technologists, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a food fact?

Yes. It sits on the Food shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Espresso is brewed under nine bars

Pressurised water pushes through a packed bed of coffee in about thirty seconds An espresso machine drives water at roughly nine times atmospheric pressure through finely ground coffee tamped into a basket. The pressure forces water into the particles quickly, so a small volume of very concentrated liquid comes out in 25 to 30 seconds. The fast passage pulls acids and sugars at once, so a shot that runs long turns harsh. It sits in Mondo's food collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Institute of Food Technologists

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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More facts like this

Pressurised water creates coffee crema foamHigh brewing pressure forces dissolved carbon dioxide into an emulsion of coffee oils Coffee beans are the seeds of a cherryEach fruit holds two flat seeds that growers strip of skin and sticky mucilage Roasting builds the aroma of coffeeGreen beans smell grassy until heat drives browning and hundreds of aromas Roasted coffee releases gas for daysCarbon dioxide trapped inside the bean escapes slowly once roasting ends Instant coffee is a dried brewed extractFactories brew coffee strongly, then remove the water from the resulting liquid Cold brew steeps without any heatGround coffee sits in cold water for many hours to extract a different profile

Tags: espresso, coffee, pressure

Espresso is brewed under nine bars: the short answers

Where does this come from, and can I check it?: Pressurised water pushes through a packed bed of coffee in about thirty seconds. The figure is taken from Institute of Food Technologists, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a food fact?: Yes. It sits on the Food shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.