After conditioning the shoe samples in both dry and humid atmospheres, clean steel balls are placed inside the shoes, which are then positioned on a metal probe apparatus; using specified resistance testing equipment, the electrical resistance between the two front probes and the third probe is measured.
Generally, conductive shoes are required to have a resistance of no more than 100 kΩ, while antistatic shoes must have a resistance between 100 kΩ and 100 MΩ. The resistance value of antistatic shoes must comply with national standards, typically falling within the 100 kΩ to 100 MΩ range. Markings on compliant safety footwear must be clear and durable, including at a minimum the product name, size, date of manufacture, standard number, and protective performance designation.
In addition to impact resistance, puncture resistance, and antistatic properties, specific technical specifications and testing methods for other safety shoe characteristics-such as electrical insulation, acid and alkali resistance, slip resistance, oil resistance, and cold resistance-are defined by corresponding national standards (e.g., GB 12011-2009, GB 20265-2006).
When purchasing safety shoes, ensure the product comes with a certificate of conformity and an instruction manual, and carefully verify that the marked protective performance meets the specific requirements of the work environment.