When it comes to ceramic tableware, the brighter the colors, the higher the risk of heavy metal contamination. The International Food Packaging Association has recently issued a warning to consumers, advising them to avoid using glazed ceramic dishes. These items may contain harmful substances that could endanger health over time.
"At first glance, these vibrant and colorful plates look very appealing," said Dong Jinshi, the association's secretary general. "However, if the manufacturing process is not properly controlled, they might exceed safety standards for heavy metals." He explained that there are different methods of producing ceramic tableware, such as overglaze, underglaze, and in-glaze decoration. Overglaze refers to patterns that have a raised texture, while underglaze involves painting the design before applying the glaze, resulting in a smooth surface.
The primary danger associated with ceramic tableware comes from the heavy metals found in the glaze and pigments. According to Dong, lead is commonly used in the glaze to enhance its color and consistency, while cadmium is often added to the pigments for vibrancy. If manufacturers don't strictly control the levels of these metals, the final products can become unsafe. Many consumers see bright, gold-rimmed or silver-edged dishes on store shelves, but these embellishments often contain toxic elements like lead, chromium, mercury, and even radium.
Dong Jinshi advises consumers to be cautious when selecting ceramic tableware. He recommends avoiding any pieces with glazed decorations, especially those used for food. If the glaze can be easily scratched off with a fingernail, it may indicate poor quality and potential contamination. To stay safe, he suggests choosing plain white porcelain instead. Before using new ceramic dishes, it’s wise to boil them for five minutes or soak them in vinegar for two to three hours. This helps remove most of the harmful substances, reducing the risk of exposure to toxic metals.
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