Como distinguir vidro sem chumbo de vidro comum?

How to distinguish lead-free glass from ordinary glass?

Water is the source of life and the foundation of health. Everyone drinks water every day. Drinking water is inseparable from water bottles or cups every day. In our daily life, we often pay attention to the safety of drinking water, but neglect the safety of glass water bottle and glass cup. There are many knowledge and science about the choice and use of glass water bottle and glass cup. Let Diller teach you to distinguish unleaded glass water bottle and glass cup.

Look at the logo: Lead-free glass water bottle and glass cup generally contain potassium, most of which are high-grade crafts and are marked on the outer packaging; while lead-containing glass water bottle and glass cup contain lead, and some lead-containing glass water bottle and glass cup contain lead oxide up to 24%.

Look at colour and lustre: Lead-containing crystal glasses have better refractive properties, and show the refractive properties of metallic glasses more perfectly; for example, some decorations of various shapes, crystal wine cups, crystal lamps and so on are made of lead-containing glass.

Heat resistance: Glasses can generally withstand very high temperatures, but generally the extreme cold and heat resistance is poor. Lead-free crystal glass is a kind of glass with high expansion coefficient, and its extreme cold and heat resistance is worse. If tea is brewed in boiling water in a particularly cold lead-free glass water bottle or glass cup, it is easy to burst.

Weighting: Lead-containing crystal glass products are slightly thicker and heavier than lead-free crystal glass products.

Listen to Sound: Compared with the metal sound of lead-containing glass water bottle and glass cup, the sound of lead-free glass water bottle and glass cup is more pleasant and beautiful, and it has the reputation of "music" cup.

Toughness: Lead-free glass water bottle and glass cup is more resilient than lead-containing crystal glass water bottle and glass cup, that is, impact resistance.