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It's #WorldBookDay today (but only in the UK & Ireland, bizarrely), so here's a reminder of the chemistry behind new and old book smells! compoundchem.com/2014/06/01/ne

Infographic on the aroma of books. The smell of old books is produced by the gradual breakdown of cellulose and lignin in paper. Type of paper and age of the book affect the compounds produced, which include furfural, vanillin and benzaldehyde. The aroma of new books is equally variable, the compounds causing it coming from adhesives, inks, and chemicals used for paper treatment. Many of these chemicals are odorless themselves, but can react and contribute to the release of aroma chemicals.

@compoundchem the book on the bottom of the old book stack looks like it has mold on the edging :blobcatshocked:

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@jessienab @compoundchem

Those are decorated edges with a deliberately inked and patterned design.

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