Distinguish smart film adhesive layer

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Protection layer is transparent. If find it is frost white side. it is ITO layer with Liquid crystal, the film layer destroyed, then the film is total damaged.
When put the protection layer from the smart film. then itself comes back. then it is adhesive side .
When put the protection layer from the smart film,itself does not come back,then it is protection side. once finish film installation,test ON/OFF,then put the protection film layer from smart film finally.
When put the protection film from the smart film, should use finger,not nail .