Testing Requirements
3.1 Sensory Requirements
The surface of enamel products should be smooth, with uniform enameling, and free from cracks, chips, fish - scale - like peeling, porcelain detachment, blisters, cracks, boiling - like marks, holes, and exposed black areas.
3.2 Physical and Chemical Indicators
|
Item |
Non - cooking (Flat Products) (mg/dm²) |
Non - cooking (Hollow Products < 3L) (mg/L) |
Cooking (Flat Products) (mg/dm²) |
Cooking (Hollow Products < 3L) (mg/L) |
Storage Tanks (mg/dm²) |
Test Method |
| Lead (Pb) ≤ | 0.8 | 0.8 | 0.1 | 0.4 | 0.1 | GB 31604.34 |
| Cadmium (Cd) ≤ | 0.07 | 0.07 | 0.05 | 0.07 | 0.05 | GB 31604.24 |