The intended end use of the product determines the requirements necessary for certification of the product. Laboratory technician Andrew Patrick sets up the load frame for crush or flattening resistance testing.
Manufacturers receive an initial audit for each production facility.
The NSF field representative visits the plant location to review certification requirements, including quality assurance, record keeping, product marking, contract, policy, and specific requirements of the standard. NSF issues a formal audit report to the manufacturer, along with any necessary issues requiring corrective action. Manufacturers must submit detailed formulation information for all products to be certified. Once the product meets all the requirements, the company signs a contract with NSF to allow regular unannounced audits of the manufacturing plants, to collect samples for monitoring testing of all products. NSF then gives the manufacturer written authorization to use the NSF Mark on the product.