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What is the 'surface energy' of a material, and how can it be determined?

   

In simple terms, the surface energy of a material is a measure of how easy it is to wet the surface of that material with a liquid. High surface energies are easy to wet out; low surface energies are harder to wet out. The term 'surface energy' is used interchangeably with the terms 'surface free energy' and 'surface tension'.

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