Porous Materials: What Are They?

By Staff WriterLast Updated May 27, 2020 7:30:24 PM ET
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Manfredrichter/Pixabay

Porous materials aren't completely solid. They have tiny holes in their makeup called pores. This makes them lighter in density than nonporous materials. Common examples include skin, sponge pumice, and soil. 

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Some people also refer to things like borders as being porous. This means that passage in and out is possible because of holes in coverage. It can also be used to mean that something's leaky.