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How to judge whether the glass type contains lead

Fanyu 2018-11-21 15:15:27

1, look at the logo: lead-free glass generally contains potassium, mostly high-end crafts and has a logo on the outer packaging; and lead-containing glass contains lead, that is, in some supermarkets and stalls common crystal glassware, its lead oxide The content can reach 24%.
float glass
2, look at the color: lead-free glass has a better refractive index than the traditional lead-containing crystal glass, more perfect display of the refractive performance of the metal glass; such as some of the various shapes of ornaments, crystal wine glasses, crystal lights, etc. Made of leaded glass.

3, look at heat resistance: glass can generally withstand high temperatures, but generally extreme heat and cold resistance. Lead-free crystal glass is a glass with a high coefficient of expansion, which is less resistant to extreme cold and heat. If it is made with boiling water in a particularly cold lead-free glass, it is prone to chipping. Foundation and internal road construction.

4, 掂 light and heavy: lead-containing crystal glass products and lead-free crystal glass products, slightly thicker.

5, listening to the sound: beyond the metal sound emitted by the lead-containing crystal glass, the sound of the lead-free glass is more pleasant and pleasant, rich in the "music" cup reputation.

6. Look at toughness: Lead-free glass is more tough and impact resistant than leaded crystal glass.