What is lead-free crystal glass?
To understand what is lead-free crystal glass, we need to first understand what is crystal glass. According to EU guidance, when a glass contains at least 24% of lead, it then can be called crystal glass. Therefore, lead-free crystal glass should actually be called fine glass. When making this type of glass, the lead is replaced with potassium oxide. You can also call lead-free crystal glass as potassium glass.
Potassium glass has many same characteristics like crystal glass. For example:
1. it has higher refractive index than normal glass
2. It can produce a lovely “ping” sound when you making a toast
3. It is 5 times stronger than normal glass