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Researchers butter up the old ‘scratch test’ to make it tough

May 27, 2011

It might not seem like scraping the top of a cold stick of butter with a knife could be a scientific test, but engineers at MIT say the process is very similar to the “scratch test,” which is perhaps the oldest known way to assess a material’s hardness and strength — or, in scientific language, its resistance to deformation.

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http://esciencenews.com/articles/2011/05/26/researchers.butter.old.scratch.test.make.it.tough

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