The reason may be the busbar installation is not very good.

Why the Transparence is Bad After Installation Smart Glass Film
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The reason may be the busbar installation is not very good. The touch
of the copper bar is not very good with smart glass film ITO layer. So
the electric resistance is is high.
So the voltage of the smart glass film is lower than we expect, and if
the voltage is not high enough for the smart glass film, the
transparence of smart glass film will be reduced.
So you better carefully restore the busbar of smart glass film to make
sure the copper bar connect well with Smart glass film ITO.



















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