With the strengthening of testing on food and pharmaceutical packaging materials, the promotion of permeation testing has found favorable opportunity.<br />
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1. Present Situation<br />
At present, the common instruments for permeation testing are of differential pressure method for gas transmission rate testing and weighing method for water vapor transmission rate testing. Besides, equal pressure method for gas transmission rate testing and electrolytic method for water vapor ...This story is related to the following:Permeability Testers