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First,the coffee after roasting ,will release more and more co2,while you pack into the coffee packaage which without the coffee valve in it, the co2 will full of your package that will make your coffee bag brust.

Second,if the co2 full of your coffee package,and the co2 full of your package,it also will oxidate your coffee bean or coffee powder.

That is why the coffee package will have the coffee valve in it.

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Q: Why the coffee package will have the coffee valve on it?
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A piece of coffee valve can keep your bag of coffee fresh. 1.The coffee ban after roasting,they will realse more and more co2 .If your coffee bag without the coffee valve init,the co2 would not be relese outside the package,and they will full of your coffee bag.While the co2 full of all your coffee bag,the coffee bag will brust.So,it will waste a bag of coffee. 2.If the co2 not enough to brust your coffee bag,and it also will in your coffee bag,that will make the coffee bean oxdite .It not only will make the coffee bean bag very soon,but also can not keep the coffee fresh and aroma. You can not taste the original aroma after the roster roast the coffee bean.


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