Others

3.1 Migration test
1. Migration tests shall be carried out in accordance with the provisions of GB 31604.1 and GB5009.156. Except for special provisions in Appendix A.
2. Metal materials and products that are expected to be reused shall be subjected to three migration tests in accordance with the requirements of GB31604.1. Among them, stainless steel materials and products shall be judged for compliance based on the results of the third test. If the migration amount measured in the first test does not exceed the limit, and there is evidence that the migration amount measured in subsequent tests will not increase, then no subsequent tests are required; metal materials and products of other materials shall be judged as unqualified if any of the three migration test results exceed the limit.3.2 Special use requirements

3.2 Labels and Identification
3.2.1 Labels and identification shall comply with the provisions of GB 4806.1.
3.2.2 Metal substrates shall also clearly indicate their material type and material composition. If their composition is consistent with the corresponding composition of the national standard grade, they may also be indicated by the national standard grade or unified digital code, such as "stainless steel 06Cr19Nil0" or "stainless steel S30408" or "aluminum alloy 3004".
3.2.3 If the food contact surface is coated with metal plating, the plating material shall also be indicated, such as "chrome plating" or "zinc-nickel alloy plating". When there is more than one metal plating layer, the metal composition of each layer shall be marked in the order of bottom plating layer - middle plating layer - surface plating layer (the plating on the food contact surface), and separated by slashes, such as "copper plating/nickel plating/chromium plating".