Method of manufacturing glass mirror from glass：
1. Paste shiny silver foil on the glass surface.
2. Then pour the mercury. Mercury is a liquid metal that can dissolve tin into a viscous silver-white liquid and adhere tightly to the glass plate. However, mirrors coated with mercury are not very capable of reflecting light. Manufacturing takes time, and mercury is toxic, so it was later eliminated. The current mirror has a thin layer of silver on the back. This layer of silver is not painted or electroplated. It relies on the chemical “silver mirror reaction” to add glucose water to the silver nitrate ammonia solution. The glucose will reduce the invisible silver ions into silver particles and deposit them on the glass to make a silver mirror, and then use a layer of paint coating.
In recent years, many mirrors in department stores have been aluminum-plated on the back. Aluminum is a silver-white shiny metal, which is much cheaper than expensive silver. The aluminum mirror is manufactured by evaporating aluminum in a vacuum and condensing aluminum vapor. On the glass surface, it becomes a thin aluminum film, glowing brightly. This kind of aluminum mirror is cheap, good in quality, and very promising.