How to check whether the hotel's glass is double-layered?

1, touch it with your hand, and the temperature of the double glass is different, which means there is a temperature difference.

2, double-decker, there is no fog when the air conditioner is turned on, but there is a single layer.

Glass is formed by melting sand and other chemicals (the main raw materials are soda ash, limestone and timely). When melting, a continuous network structure is formed, and when cooling, the viscosity gradually increases and hardens, resulting in crystallization of silicate nonmetallic materials. The chemical composition of ordinary glass is Na2O CaO 6SiO2, and the main component is silica, which is an amorphous solid with irregular structure. Widely used in buildings, used for wind and shading, belonging to a mixture. There are colored glasses mixed with oxides or salts of certain metals to show colors, and tempered glasses made by special methods. Some transparent plastics (such as polymethyl methacrylate) are sometimes called plexiglass.