Today I Found Out
Why Do Pages of Books and Newspapers Turn Yellow Over Time? (2019x216)
Exibido em:: Ago 15, 2019
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In this video:
When I was a kid, my parents had a collection of historic old, yellowed newspapers. For example, I distinctly remember an old Washington Post newspaper sitting on a bookshelf from July 21, 1969 with the headline “The Eagle Has Landed – Two Men Walk on the Moon.” Or a fading, brownish-yellow one from August 8, 1974 with the big headline, “Nixon Resigns.” These newspapers are fascinating artifacts documenting history, from remarkable moments to the relatively mundane. Unfortunately, they were also hard to read due to the yellowed, brown color and fading print. So why do old newspapers – and books – turn yellow? And is there any way to prevent this from happening?
Want the text version? http://www.todayifoundout.com/index.php/2015/03/old-newspapers-book-pages-turn-yellow/
Sources:
http://science.howstuffworks.com/question463.htm
http://indianapublicmedia.org/amomentofscience/books-turn-yellow-fall/
http://www.conservatree.org/learn/Papermaking/History.shtml
https://books.google.com/books?hl=en&lr=&id=NCkXBQAAQBAJ&oi=fnd&pg=PP1&dq=E.+Sj
http://en.wikipedia.org/wiki/Wood
http://siarchives.si.edu/services/forums/collections-care-guidelines-resources/why-does-paper-yellow
http://www.library.illinois.edu/prescons/about_us/faq.html#7
http://www.ipst.gatech.edu/amp/collection/museum_invention_paper.htm
https://books.google.com/books?id=EffBZZPXcWwC&printsec=frontcover&dq=Charles+Fenerty+an
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