June 25, 2004, Newsletter Issue #8: Freshness and One-Way Valves

Tip of the Week

FRESHNESS - AND ONE-WAY VALVES

Prior to the invention of coffee bags with one-way valves, roasted beans had to be left to cool and "gas off".

Why? Because freshly roasted coffee beans emit gases and continue to do so for some considerable time. If the beans were immediately packaged, these emitting gases would cause the bag to expand and eventually explode.

So roasters, for a 24-hour period after roasting, had to let the beans cool and allow all the gases to escape. Of course, there was a certain amount of deterioration taking place as the beans were being exposed to oxygen. Air is the enemy of roasted coffee beans.

The one-way valve, by allowing the gases to escape from the bag, permits the roaster to almost immediately package the fresh roasted coffee.

As an important added benefit, as the gases escape through the valve, they force any harmful air out of the bag.

So whenever you buy a bag of beans, check the bag and make sure it includes a one-way valve.

It`s a sign of freshness!

>> If you found this tip useful - please forward this newsletter to friends, family and colleagues. (Especially if you think they need some help in brewing a decent cup of coffee!)

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That`s it for this week.

Nick Usborne
http://www.coffeeandteawarehouse.com
Gourmet Coffee at Wholesale Prices