The light is an important factor that makes the beer can deteriorate from flavor of hops flowers. เหลือจาก fermentation process of beer. This will result in the beer is the foul odor and bitter taste more when exposed to sunlight, so in the test ว่าขวด glass of this kind, sensitive to light, how much is necessary. To bring the information to calculate Quantity of additives to add to reduce the transmission of light.
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