Why Do Old Books Smell So Good?

The video explores the distinct scents of old and new books, which are caused by various chemical compounds found in paper, ink, and bindings. These compounds, including cellulose and lignin, break down over time, releasing volatile organic compounds (VOCs) that contribute to the unique smells. Different VOCs, such as benzaldehyde, vanillin, and ethylbenzene, are responsible for specific scents like almond, vanilla, and sweetness. Modern manufacturing processes introduce different VOCs due to the use of chemicals like peroxide and alkyl ketene dimers. Understanding these scents helps scientists and historians learn about the age, condition, and history of books.

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