4.1 Raw material requirements comply with the provisions of GB10767 and the following requirements. 4.1.1 Packaging materials that have been irradiated should not be used. 4.1.2 The raw milk used should come from self-built milk source base. 4.6 The limits of pollutants shall comply with the provisions of GB2762, among which the limits of lead and cadmium shall comply with the provisions of Table 1.