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Permeation

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Permeation is the process by which a chemical passes through a surface free of visible openings like pinholes or pores. Instead, the chemical passes between molecules. The rate of permeation is referred to as breakthrough, a substance’s resistance to which is referred to as its chemical resistance.[1]

References

  1. http://www.ansellpro.com/download/Ansell_7thEditionChemicalResistanceGuide.pdf
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