Professional Custom Lamp Holder Accessories Manufacturer

The black point of incandescent lamp holder is generally black glass. The role of the black circle of the insulating connector to a metal lamp cap housing and the solder pieces. This sealing ring can usually use an insulating material such as glass, ceramic, bakelite. The glass has a low cost, easy processing, good insulation, high temperature, adequate sources of raw materials, the lamp most of the use of glass as an insulator. Lamp holders glass commonly used the cullet (such as recycling waste beer bottles), added manganese oxide, iron oxide, pigment red pulverized coal with which the colored glass is melted into a lamp black.