1, sound difference

Pick up a glass and tap it with your fingers. Lead-free glass will make a crisp sound, while lead-containing glass will make a dull sound. Besides the metallic sound of lead-containing crystal glass, lead-free glass sounds better.

2. Differences in quality

Lead-free glass will be slightly heavier than lead-containing glass. Glass of the same size, the heavier one, usually belongs to lead-containing glass.

3, the color difference

In terms of color, lead-free glass is more transparent and refractive than lead-containing glass. Warm lead-containing glass looks opaque and always gives people a feeling of being bruised.

4, the difference of heat resistance

Glass is very easy to burst, and a little hot water will crack. The heat resistance of lead-free glass is many times better than that of lead-containing glass. Generally speaking, glass can withstand very high temperatures, but its extreme cold resistance and heat resistance are poor. Lead-free crystal glass is a kind of glass with high expansion coefficient, and its extreme cold resistance and heat resistance are worse. If you make tea with boiling water in an extremely cold lead-free glass, it will burst easily.

Extended data

High-lead crystal glass refers to a vessel containing a large amount of lead, generally more than 24%, which is very similar to crystal after being fused with glass. High-lead crystal glass has the following advantages: high refractive index, high transmittance, improved mechanical reliability and chemical resistance, and is especially suitable for the production and refining of glass jewelry products, decorative items including dendritic decorative lamps and semi-finished products.

The lead content of all-lead crystal glass is more than 24%, and the lead content of lead crystal glass is less than 24%. The advantages of adding lead are heavier, textured, more transparent, clear and bright; The disadvantage is that it is soft and easy to wear, so the more lead, the better. The new lead-free and barium-free crystal glass is extremely elastic, crystal clear and twice as safe as ordinary crystal glass.

References:

Baidu encyclopedia-high lead crystal glass