Is the glass poisonous?

Generally speaking, as long as you buy glass cups in some regular shopping malls, the quality can be guaranteed. Such glass cups have no toxic side effects, and drinking water with glass cups will not affect your health. We know that the most popular glasses on the market are crystal glass cups and ordinary glass cups. There are lead-free crystal glass cups, and there are also lead-containing glass cups. When choosing and buying glass cups, be sure to look at the labels and color and buy glass cups without toxic side effects.

Is glass poisonous?

There are two main types of crystal glass currently circulating on the market: lead-free crystal glass and leaded crystal glass. The former generally contains potassium, and is mostly high-end handicrafts with markings on the outer packaging; the latter contains lead, that is, the crystal glassware commonly seen in some supermarkets and street stalls, the lead oxide content can reach 24%. In daily life, when using cups made of leaded artificial crystal to hold acidic beverages such as alcohol, cola, honey, fruit acid juice, or other acidic foods. Lead ions may form soluble lead salts and be ingested by the human body through beverages or food, causing serious harm to health. In addition, some glass cups are painted in various colors. Although they look good, they contain harmful or even highly toxic elements, such as heavy metals such as lead, chromium, cadmium, nickel, copper, manganese, and non-metals such as arsenic, fluorine, chlorine, and sulfur. During the industrial production process, these elements will be released and vaporized, polluting the atmosphere and water sources, causing harm to humans.

How to identify lead-free glass?

1. Look at the label: lead-free glass generally contains potassium, and most of them are high-end handicrafts with labels on the outer packaging; while leaded glass contains lead, that is, the crystal glassware commonly seen in some supermarkets and street stalls, the lead oxide content can reach 24%. 2. Look at the color: Lead-free glass has better refractive index than traditional lead-containing crystal glass, and more perfectly displays the refractive index of metallic glass; for example, some ornaments of various shapes, crystal wine glasses, crystal lamps, etc. are made of lead-containing glass. 3. Look at the heat resistance: Glass cups can generally withstand very high temperatures, but generally have poor resistance to extreme cold and heat. Lead-free crystal glass has a high expansion coefficient and is less resistant to extreme heat and cold. If you use boiling water to make tea in a particularly cold lead-free glass, it is prone to bursting.