All your answers can be found in the MIL-B-81705C standard file. In particular, an antistatic shielding bag (Model III) can be considered invalid if it meets any of the following conditions: * Standard bag MIL for electrostatic bag generation The stratification phenomenon detailed in Section 4.8.4.1 of B-81705C. * The static discharge decay rate is greater than 2 seconds. * Attenuation of electromagnetic interference is less than 10dB. * The diameter of the small hole is larger than 2mm. *Cannot shield electrostatic discharge events below 30kV. * The surface resistance per square area inside and outside is greater than 1012, and the internal resistance per level is less than 105. In short, due to the Faraday effect, if there are creases or small holes in the shielding bag, it still has a shielding effect. However, it is safer to throw away these electrostatic bags, which may cost more testing and just replace them with proof.
