This process was named after the French scientist Louis Pasteur, who invented it. Pasteurization kills any bacteria that might be present in milk, and ensures its health.
How is milk pasteurized? It is simply heated. Pasteur discovered that if milk is heated to a certain temperature, no bacteria can survive in the liquid.
There are two common processes of pasteurizing milk. One is to heat it to at least 63° C. for 30 minutes, and the second is to heat it to 72° C. for 15 seconds.
In the United States, the first time milk was pasteurized occurred in 1895. Today, all milk that is marketed must be pasteurized.
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