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That herbal, minty-grassy hop character I described ten years ago doesn't seem to have changed at all, and that lingering bitterness is still present too.
I'm happy to say this porter is enjoyable today as it was the first time I tasted it decades ago.
Before a commercial beer is bottled, it will go through a stabilization process in order to prolong its shelf life and therefore affect the beer's freshness date. Pasteurization is a process by which a liquid is heated for a brief amount of time to kill any microbes that may be in the liquid.
Pasteurization has also been used for many years to keep milk safe for drinking due to bacteria that may be present.
The length of time that the beer is allowed to age depends on the personal preference of the brewers or drinkers since with time the taste would change.For ten years there was a slow growth in the practice of beer brewers to add freshness dates to their products.The concept grew rapidly in popularity mostly due to the Anheuser-Busch company's heavily marketed "Born-On dates" starting in 1996.The process of bottle conditioning is similar to that of letting wine age within the bottle.Bottle conditioning is popular with many home brewers who cannot afford expensive filters or pasteurization equipment.