How to distinguish between true and false insulating glass?

For real insulating glass doors and windows, it is necessary to seal the two pieces of glass with sealing tape first, and firstly, the middle is evacuated, and then the inert gas is filled. Only by doing these two points seriously can it have good sound insulation and heat insulation performance.

However, there are many cheap and low-quality insulating glass doors and windows that are simply glued together with two pieces of glass, and have not been processed as described above, so there is no unique sound insulation and heat insulation effect of "hollow".

Therefore, to judge the authenticity of insulating glass, it is necessary to see whether the glass is sealed. The two pieces of glass of many fake hollow glass doors and windows are glued with black PVC foam strips and are not sealed. And the really hollow glass doors and windows are glued to the glass with a special sealing tape, which can ensure absolute sealing.

In addition, there is an aluminum spacer between the two pieces of real insulating glass. There are many ventilation holes on the aluminum spacer, and a desiccant is placed inside, which can absorb some moisture in the gas and prevent the glass doors and windows from being heated. There is a foggy phenomenon, and the fake does not have that.