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Many people think that using crystal tableware to serve food and drinks looks gorgeous, especially for some people who are looking for perfection and class of life. But perhaps many people can't imagine that using lead-containing artificial crystal glass to hold acidic drinks such as honey can cause lead contamination and seriously endanger the health of the family.
According to the Health Times, "According to Professor Zhu Qishang, director of the poisoning department of the Fourth Hospital of West China, Sichuan University, many of the patients admitted to the poisoning department of the hospital for lead poisoning have used crystal glass containers to drink acidic beverages."
The relevant experts say that crystal products are a rather threatening source of lead pollution. The content of lead oxide is often as high as 20%-30%, which is generally not enough to cause lead poisoning when used to hold water, but if used to hold wine or acidic drinks, the lead in crystal products will be precipitated and dissolved in the wine or acidic drinks. Experiments show that the longer the wine is served, the higher the lead content in the wine.
Buy crystal glass tableware can be distinguished by the sound, feel and appearance of glass, crystal glass with lead, crystal glass without lead.
Ordinary glass products have dull color, poor refractive index, rough workmanship, poor feel, and even bubbles in some places, and dull sound when gently knocked
Crystal glass products are brighter than ordinary glass products, with strong refractive index, exquisite workmanship and good handfeel, and look like they are made of crystal, and have a crisp metallic sound when gently tapped. Leaded crystal glass products compared with lead-free crystal glass products, to look slightly thicker.
Crystal glass containers are divided into two types: lead-free crystal glass and lead crystal glass. As the color, texture and gloss of ordinary glass are less than ideal. The addition of lead in glass can greatly improve the refractive index of glass, looks like crystal made, so called crystal glass, some of the various shapes of ornaments, crystal glass, crystal lamps, etc. is made of leaded glass.
There is no national standard. At present, our country has not developed a national standard for crystal glass, because there is no national standard, many companies are their own corporate standards for production, but most companies have made reference to the EU standards for production.
The EU standards for crystal glass is divided into three types of lead-free, lead and high lead. The lead oxide content of medium lead glass reaches 24%; the lead oxide content of high lead glass reaches 36%.
If crystal glass containers are produced according to EU standards, no matter which product, how much lead is contained inside, there are strict international regulations, and it should be safe for human body. However, due to the lack of standards in China, we cannot rule out the situation that individual manufacturers are producing at random and the quality of products is difficult to guarantee.
When people use leaded glassware in daily life, they should try to avoid acidic drinks or food, and it is better to use ordinary glassware. Conditions permit, use lead-free crystal glass as wine glasses and kitchen utensils, which is more safe and reliable.
Yatai glassware, crystal glassware, double glassware made of lead-free crystal glass, which is beneficial to human body and fully meets people's health standards, is safer and more reliable.
