Naked Science Forum
Non Life Sciences => Chemistry => Topic started by: Drew Gilmore on 10/11/2008 22:53:00
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Drew Gilmore asked the Naked Scientists:
Why does paper become translucent when it comes into contact with oil or grease? Such as when you put pizza on a paper napkin you can see through the paper where the pizza grease was absorbed by the paper.
What do you think?
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The oil fills in the gaps between the fibres in the paper.
The rest of the answer is a bit like the explanation of why snow is white, even though it's made of ice which is transparent.
http://www.thenakedscientists.com/forum/index.php?topic=7281.msg76594#msg76594