Identify Whether A Double Glass Cup Contains Lead?

1. Look at the toughness of the double-layer glass: lead-free glass is more tough than lead crystal glass, that is, impact resistance.

2. Weigh the weight in hand: Compared with lead-free crystal glass products, lead-containing crystal glass products are slightly thicker.

3. Listening to the sound: In addition to the metallic sound of the leaded crystal glass, the sound of the lead-free glass is more pleasing to the ear and has the reputation of "music" cup.

4. Look at the color of the cup: lead-free glass has better refraction performance than traditional lead crystal glass, and can better show the refraction performance of metal glass; such as some jewelry of different shapes, crystal wine glasses, crystal lamps, etc. Made of lead glass.

5. Look at heat resistance: glass cups can generally withstand very high temperatures, but generally have poor cold resistance and heat resistance. Lead-free crystal glass is a high-expansion coefficient glass, which has poor cold resistance and heat resistance. If you add boiling water to make tea in a particularly cold lead-free glass, it is easy to burst.

6. Look at the logo: lead-free glasses generally contain potassium, most of which are handicrafts, and there are signs on the outer packaging; lead-containing glasses contain lead, and this crystal glassware is very common in large markets and street stalls, and Contains up to 24 percent lead oxide.