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New Sieve Certification, Per A.S.T.M- E11-22 Section 7.2.2 An Inspection sieve certificate shall state at a minimum the value for the average aperture size, separately in both the warp and shute direction of the sieve cloth. A Certificate with this inspection data must be supplied. All of the procedures will be performed by highly skilled individuals using state of the art Nikon Comparators.
