For most of its history, candy has been sold by weight. Early Americans could visit their local general store and pick up a pound of peppermints or nonpareils. These sweet treats were usually unwrapped, which made them relatively cheap. But as automation increased and the number of candy factories grew (there were over 400 of them in the U.S. by the middle of the 19th century), it became possible to wrap each candy individually. Of course, it did not make much giveaways sense to wrap most candy at the time, since it was so fragile. The candy bar changed all that.
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