High-white glass is commonly known as "ultra-white glass" or "ultra-transparent glass", which is called "low-iron glass" in the profession, and it is not lead glass. Lead glass is mostly used in the field of radiation protection. For example, lead glass is used in the perspective window of XRD.
Ultra-white glass is a kind of ultra-transparent low-iron glass, also known as low-iron glass and high-transparency glass. It is a high-quality, multi-functional new high-grade glass variety, with a light transmittance of over 91.5%. It is crystal clear, high-grade and elegant, and is known as the "Crystal Prince" of the glass family.
Extended information:
In the process of glass manufacturing, if the content of iron is too high, there will be more internal color components, which will easily be absorbed when light passes through the glass, resulting in a decrease in light transmittance, which is what we call low transparency.
It can be seen that in ordinary glass without obvious defects (nodules, bubbles, stripes, impurities, optical distortion, etc.), the iron content has a great influence on the light transmittance. Therefore, ultra-white glass is to reduce the iron content in the glass as much as possible (usually controlled in the range of ≤.11), and increase the light transmittance to over 92% without obvious defects, which gives people a crystal clear feeling from the surface.
reference source: Baidu encyclopedia-ultra-white glass.