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Number of bars of pressure in a standard bottle of Champagne or sparkling wine made by the traditional Champagne method. One bar is the same as 1 “atmosphere” and each is equal to 14.7 psi (pounds per square inch) of pressure. Typically, a bottle of Champagne has between 70 and 90 psi, which is nearly 3 times the pressure in your car’s tires.

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