It is mainly because the silver layer (aluminum layer) of the mirror is oxidized to black under the action of electrolyte (acid, alkali, salt, etc.). ).

Common substances that corrode mirrors.

1, trace acid gases (carbon dioxide, sulfur dioxide) in the air.

2. Concrete (water-soluble salt produced by alkali precipitation of concrete)

3, daily necessities (including surfactants, metal ions, the system is generally alkaline or acidic)

4. Human sweat (salt)

5. Various pollutants brought by the construction site or other decoration materials, such as silica gel (glass glue),

Dirty water, moist air, etc.

Solution of black edge of lens

The latest edge sealing adhesive developed by Zhongshan Down Glass Co., Ltd. can completely solve the problem of black edge. Its mechanism of action:

1. Edge banding agent can form a complex with silver, which makes silver passivated into a passivation layer, which is more difficult to be oxidized and corroded.

2. At the same time, a dense protective film is formed on the surface to prevent the penetration of various electrolytes, cut off the contact between the electrolyte and the silver layer (aluminum layer), protect the mirror from corrosion, and greatly prolong the service life of the mirror.