What safety indicators should you pay attention to when buying ceramic tableware

Release Time:

2025-06-13

When buying ceramic tableware, safety indicators are the core concern, and the following are the key aspects to pay attention to:

When buying ceramic tableware, safety indicators are the core concern, and the following are the key aspects to pay attention to:
1. Material and raw material safety
Clay / Porcelain Clay Quality: High-quality tableware uses pure raw materials such as kaolin, and inferior products may be adulterated with industrial waste or clay with excessive heavy metals.
Glaze safety: The glaze should be food grade, and the use of inferior chemical pigments (may contain heavy metals such as lead and cadmium) should be avoided.
2. Heavy metal content (key indicators)
Lead and cadmium precipitation: this is the most alarming indicator. The national standard (such as GB 4806.3-2016) stipulates that the lead precipitation ≤ 0.2mg/L and the cadmium precipitation ≤ 0.05mg/L.
Check the test report: Regular products should be accompanied by a third-party test certificate, which clearly focuses on metal content.
3. Production process and certification
Glazing process:
Underglaze color> mid-glaze color> overglaze color: underglaze color (pigment under the glaze layer) is safer, overglaze color (pigment on the surface) If the process is poor, the pigment is easy to fall off and precipitate heavy metals.
Avoid "three no-products": products without factory name, factory address, and implementation standards, and no guarantee for process control.
Certification Marks:
Domestic: Look for the "QS" food contact material mark or "CNAS" certification test report.
International: such as the European Union "CE", the United States "FDA" certification (export products can be referenced).
4. Appearance and structure inspection
Glaze integrity: The surface needs to be smooth, free of bubbles, cracks or peeling, and the damaged tableware is easy to hide dirt and dirt, and heavy metals are more likely to precipitate after the glaze is damaged.
Colors & Patterns:
Avoid tableware that is too brightly colored or has complex patterns on the inner walls (dark pigments may contain more heavy metals).
Try to choose unpatterned or light-colored glaze for the inner wall to reduce direct contact between pigments and food.
5. Adaptability of use scenarios
High temperature test: If it is used in microwave ovens and ovens, it is necessary to confirm that the product is marked as "can be used at high temperatures", as inferior ceramics may crack due to poor thermal stability and release harmful substances.
6. Smell and feel
No pungent odor: Inferior tableware may have residual smell of chemical raw materials, which can be smelled when buying.
Delicate feel: high-quality ceramics feel smooth, and inferior products may be rough and sandy, indicating that there are many impurities in raw materials.
Summary: Safe purchase steps
Choose formal channels (supermarkets, brand stores), and refuse low-cost and inferior products;
Check the packaging identification (implementation standard GB 4806.3, factory name, address, material description);
Look at the glaze process (give priority to underglaze color, and the inner wall is better plain);
The test report is requested to confirm that the heavy metal index is up to standard.