The One Way Valve Bag
Often times you will find pre-ground coffee (and sometimes whole bean) in vacuum-sealed bags. Well, while this may be acceptable for pre-ground coffee, it certainly is not acceptable for whole bean coffee. Here’s why:
When coffee is first roasted it emits CO2 for several days after the roast
Yet, it needs to be protected from air (O2)
Therefore, a one way valve bag that allows CO2 to escape without allowing O2 to enter, is essential to coffee freshness.
So please, please, only buy whole bean coffee bags that come in one way valve bags. Additionally, make sure that there is as little space as possible between the top of the bag on the coffee beans (i.e. little air space). Here is what a one way valve bag looks like :below picture.
our company is focus on making one-way degassing valve,we are the professional of making one-way degassing valve,we are confident on the quality of Wojin valve: WJ1901and WJ1902.
welcome to know more about the one-way degassing valve's application: http://www.wojinvalve.com/one-way-degassing-valve.html
Often times you will find pre-ground coffee (and sometimes whole bean) in vacuum-sealed bags. Well, while this may be acceptable for pre-ground coffee, it certainly is not acceptable for whole bean coffee. Here’s why:
When coffee is first roasted it emits CO2 for several days after the roast
Yet, it needs to be protected from air (O2)
Therefore, a one way valve bag that allows CO2 to escape without allowing O2 to enter, is essential to coffee freshness.
So please, please, only buy whole bean coffee bags that come in one way valve bags. Additionally, make sure that there is as little space as possible between the top of the bag on the coffee beans (i.e. little air space). Here is what a one way valve bag looks like :below picture.
our company is focus on making one-way degassing valve,we are the professional of making one-way degassing valve,we are confident on the quality of Wojin valve: WJ1901and WJ1902.
welcome to know more about the one-way degassing valve's application: http://www.wojinvalve.com/one-way-degassing-valve.html
welcome to chat with me to know more about the one-way degassing valve's information.
email: hebe@wojinvalve.com
skype: mai.hebe
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