There are two methods of electroless silver plating and vacuum evaporation for surface processing of reflective imaging surface of glass, the chemical silver plating method is the most commonly used.
The method is to dissolve silver nitrate in water, add ammonia and sodium hydroxide solution and dilute it into silver ammonium hydroxide, and make silver plating solution. To convert sugar or formaldehyde, potassium sodium tartrate solution for reducing liquid. The glass is cut, grinding edge (also after grinding and polishing), surface cleaning, the use of tin chloride dilute solution sensitization, and then wash, and then mixed with silver plating liquid and reducing liquid to immediately soak the surface, the mirror after the formation of wash, and then can be copper and coating protective paint.
Vacuum evaporation is to wash the glass, placed in the 0.1~10pa vacuum of the evaporation of the device, the spiral tungsten wire power, resulting in the high temperature of the spiral aluminum alloy evaporation into a gaseous, deposited on the glass surface to form a mirror. can also use electron gun to replace tungsten wire heating. Vacuum evaporation process can also be smooth metal surface processing into a mirror.
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