<p>Regarding quality issues, the chances are the gas in the pod isn't air. Perishable products are frequently described as being 'packaged in a protective atmosphere'.</p>

<p>As to why, I'm not sure what the need would be. It could just be a difference in atmospheric pressure between the factory and your location which means the pods bulge.</p>

CC BY-SA 3.0
2016-10-19T12:46:43.500Z
2016-10-19T12:46:43.500Z
QWasson
<p>Inert gases are known to be chemically stable; they don't react with materials around. Based on that fact Ernesto Illy, the son of the founder of the famous coffee roasting company, invented the method of filling a can of roasted coffee beans with pressurized inert gases. Many years they held the patent for this method and still pressurized roasted coffee cans are the fingerprint for that company. This method is known to protect the roasted beans for a longer period; however it's not magical. So, the beans will stale eventually.</p>

CC BY-SA 3.0
2016-10-19T19:56:14.803Z
2016-10-19T19:56:14.803Z
MTSan
<p>I am quite sure that air prejudices the quality of the coffee. So why some coffee pods are under pressure? Shouldn't they be in vacuum?</p>

<storage><quality><pods>
Why some coffee pods are under pressure?
Stefano
# Why some coffee pods are under pressure?

(Asked by: username_0 on 2016-10-19)

I am quite sure that air prejudices the quality of the coffee. So why some coffee pods are under pressure? Shouldn't they be in vacuum?

**Tags:** storage, quality, pods


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## 2 answers

### Answer by username_2 on 2016-10-19. Score: 3 | Accepted answer

Inert gases are known to be chemically stable; they don't react with materials around. Based on that fact Ernesto Illy, the son of the founder of the famous coffee roasting company, invented the method of filling a can of roasted coffee beans with pressurized inert gases. Many years they held the patent for this method and still pressurized roasted coffee cans are the fingerprint for that company. This method is known to protect the roasted beans for a longer period; however it's not magical. So, the beans will stale eventually.


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### Answer by username_1 on 2016-10-19. Score: 2

Regarding quality issues, the chances are the gas in the pod isn't air. Perishable products are frequently described as being 'packaged in a protective atmosphere'.

As to why, I'm not sure what the need would be. It could just be a difference in atmospheric pressure between the factory and your location which means the pods bulge.


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