TGK25108 Micro Pressure Regulating Valve pressure regulating valve,micro pressure regulating valve,Self-operated pressure regulating valve,Self-operated micro pressure regulating valve,pressure regulating valve Self-operated,micro pressure regulating valve Self-oper Jiangsu Tanggong Automatic Control Equipment Co., Ltd. , https://www.tgcontrolequipment.com
With the arrival of summer, many women are turning to a wide range of imitation jewelry. These pieces are trendy, affordable, and popular among young fashion enthusiasts. However, as the demand increases, so does concern over the potential health risks associated with these products. Due to the lack of strict regulations on harmful substances, "jewelry disease" caused by simulated jewelry has become a growing issue. Many imitation pieces lack clear labeling, product certifications, or details about their composition and manufacturer, making it difficult for consumers to make informed choices.
On May 1, 2013, China introduced the national mandatory standard GB 28480-2012, which sets limits on harmful elements such as lead, cadmium, and nickel in jewelry. This regulation brought attention to the dangers posed by certain types of simulated jewelry, especially those that come into direct contact with the skin.
Imitation metal jewelry is typically made from materials like titanium steel, copper-zinc alloys, or plastic. To enhance their appearance, these items are often coated with metals like lead, nickel, or cadmium. While advancements in manufacturing and increased oversight have reduced the prevalence of lead and cadmiumè¶…æ ‡ (exceeding standards), nickel remains a major concern. Most nickel-based alloys used in silver-free jewelry can release more nickel when exposed to heat or sweat, which is common during the summer months. This can lead to allergic reactions such as contact dermatitis. If left untreated, prolonged exposure may even result in more severe skin conditions, including malignant changes.
Experts advise consumers to be cautious when purchasing imitation jewelry. First, look for products that clearly state the material type, manufacturer information, and certification. Second, choose earrings and other piercing-style accessories carefully, as they are more likely to react with the body’s chemicals. According to GB 28480-2012, the nickel release limit for pierced jewelry is 0.2 mg per square centimeter, while for other jewelry that touches the skin, it's 0.5 mg per square centimeter. It's best to opt for jewelry made from precious metals like gold or silver, or natural gemstones, to minimize risk.
When buying necklaces, bracelets, or other skin-contact accessories, avoid overly bright or shiny pieces, as they may contain higher levels of harmful metals. Also, try to remove jewelry during activities that cause heavy sweating, such as swimming or bathing, and avoid wearing it near chemical products like cosmetics or lotions. People with sensitive or scarred skin should consider avoiding artificial metal jewelry altogether.
(Bo Qibei, Qian Dan)