Podcasts > Kategorie: Wissen und Wissenschaft > Kanal: BrainStuff

Why do newspapers turn yellow over time?

Kategorie: Wissen und Wissenschaft
Kanal: BrainStuff
Datum: 21. Mai 2012, 21:19
Stufe: B1-B2 (Mittelstufe)

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Newspapers turn yellow over time because they contain lignin, a substance in wood that oxidates when exposed to air and light. Learn more about lignin and paper processing in this episode of BrainStuff. Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers