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How to identify lead-free glasses?

admin 2021-11-24 10:41:0503 Comments
Under normal circumstances, as long as you buy glasses in some regular shopping malls, the quality can still be guaranteed. Drinking water from the glasses will not affect your health. We know that the most popular ones are crystal glasses and ordinary glasses. Lead crystal glass, in addition to leaded glass, when choosing and buying glass, you must look at the logo, look at the color, and buy glass that has no toxic side effects.
At present, there are two main types of crystal glasses circulating in the market: lead-free crystal glass and lead-containing crystal glass. The former is generally potassium, mostly high-end crafts and marked on the outer packaging; the latter contains lead, which is common in some supermarkets and street stalls,glass cookware .
The lead content can reach 24%. A cup made of lead-containing artificial crystal is used in daily life when it contains acidic beverages such as alcohol, cola and fruit juice containing fruit acid or other acidic foods. Lead ions may form soluble lead salts and be ingested by the human body along with beverages or foods, seriously endangering health.
        In addition, some glasses are painted in various colors and contain harmful elements, such as heavy metals such as lead, chromium, cadmium, nickel, copper, and manganese, and non-metals such as arsenic, chlorine, and sulfur. In the industrial production process, these elements It will be released, vaporized, pollute the atmosphere and water sources, and cause harm to humans.
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How to identify lead-free glasses?
        Look at the logo: Lead-free glass cups generally contain potassium, and are mostly high-end handicrafts with a logo on the outer packaging. Lead-containing glass cups are crystal glassware commonly found in some supermarkets and street stalls, and their lead oxide content can reach 24%.
        Look at the color: Lead-free glass has better refractive index than traditional leaded crystal glass, and it perfectly shows that the refractive ornaments of metal glass, crystal wine glasses, crystal lamps, etc. are made of leaded glass.
        Look at heat resistance: Lead-free crystal glass is a glass with a high coefficient of expansion, and its resistance to extreme cold and heat is even worse. If you use boiling water to make tea in a particularly cold lead-free glass, it is easy to get hot.
        Lightweight: Compared with lead-free crystal glass products, lead-containing crystal glass products are slightly heavier.
        Listening to the sound: the metal sound of the super lead crystal glass, and the sound of the lead-free glass is more pleasing to the ears, rich in the reputation of the "music" cup.
        Look at toughness: lead-free glass is more tough than leaded crystal glass, that is, impact resistance.

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