Hardware Reference
In-Depth Information
Ion-X Glass
Ion-X glass is five times stronger than standard glass. It's made by dipping the glass in a
750° F molten potassium salt bath. An ionizing process then takes place where the smaller
sodium ions are removed from the glass and replaced by larger potassium ions. This
hardness and resistance to scratches meant it was used in the space shuttle, and is still used
today in the windows of high-speed trains. Now, it's being used to protect the flexible
Retina display on Apple Watch Sport.
