How to identify whether glass bottles contain lead
How to identify lead-free glasses
1, see the logo: lead-free glass generally contains potassium, mostly high-end crafts and signs on the outer packaging; lead-containing glass is lead, which is common in some supermarkets and ground glass crystal glassware, its lead oxide Content up to 24%.
2, see color: Lead-free glass than the traditional lead-free crystal glass has better refractive index, more perfect display of the refraction properties of metal glass; such as a variety of modeling ornaments, crystal wine glasses, crystal lamps, etc. Made of leaded glass.
3, see the heat resistance: glass can generally withstand very high temperatures, but the general cold and heat resistance is poor. Lead-free crystal glass is a glass with a high coefficient of expansion, and its extreme cold and heat resistance is even worse. If boiled in boiling water in a particularly cold lead-free glass, it is prone to burst.
4. Light weight: Lead-free crystal glass products are thicker than lead-free crystal glass products.
5. Listen to the sound: The sound of the metal emitted by the lead-free crystal glass is better than the sound of the lead-free glass. It is rich in the reputation of the “music” cup.
6, see toughness: Lead-free glass than lead crystal glass is more resilient or impact resistance.