A cup made of artificial crystal containing lead. When alcohol, cola, honey, fruit juice, etc. containing fruit acid are acidic, lead ions may form soluble lead salts when drinking or other acidic foods, which will be ingested by the human body with drinks or foods, seriously endangering health.
10 yuan's cheap glass is not necessarily toxic, but the glass coated with pigments contains very harmful substances, such as heavy metals such as lead, chromium, cadmium, nickel, copper and manganese, and nonmetals such as arsenic, fluorine, chlorine and sulfur. In the process of industrial production, these elements are easily left on the cup, which will naturally cause harm to the human body.
Identification method of glass toxicity
1. Distinguish whether it is toxic or not by color: Generally speaking, lead-containing glass has much better refraction than lead-free glass, so its color is beautiful, and it is often used as a crystal lamp or an ornament. Therefore, most bright and beautiful lead-containing glasses have a high probability of containing poison, while dull lead-free glasses have a low probability of containing poison.
2. Identify whether it is toxic by identification: lead-free glass is non-toxic, and lead-free glass is mostly potassium, which is generally marked on the outer packaging; Lead-containing glass proves that it contains lead, and some cheap crystal glassware contains lead and has a high content of lead oxide, so the probability of labeling lead-free glass is relatively high.
3. Judging whether it is toxic according to the heat resistance: Glass has the characteristics of high temperature resistance. Lead-free crystal glass is a kind of glass with high expansion coefficient, and its extreme cold resistance and heat resistance are poor. If you use a lead-free cup to make tea with boiling water, it will easily explode and prove to be non-toxic.