Why do newspapers turn yellow over time?
from BrainStuff Hosted by iHeartPodcasts
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://www.iheartpodcastnetwork.com
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This episode was published on May 21, 2012.
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