One Way Mirror Films and How They Work

One-way mirror films provide the highest ratings in heat reflection as well as provide excellent privacy and security, because of its mirror effect. Mirror films in addition, will block 99% of the suns UV rays, which can fade curtains, carpet, wood, upholstery, and furniture, as well as cause certain health problems.

20% mirror films are often used as one-way mirrors to provide privacy and security. The mirror effect is created when the visible/subject side is well illuminated so that individuals on the opposite side of the window see only their reflection. This is not a complete 100% reflection, but actually an 80% reflection. One-way glass is coated with a thin metal layer, which is often aluminum. This metal layer reflects more of the light, which reaches it. Thus, mirrored glass is often position between a room, which is relatively dark and a room, which is relatively illuminated.

Because the glass is coated with a very thin reflective coating, which is often referred to as a half-silvered surface, approximately only half the amount of light will be reflected, while the other half passes through. The reason that individuals can only see from one side of the glass is because of the difference in the lighting in the two rooms.

The room or out side of the building where the glass resembles a mirror is brighter than the room where the glass acts as a window. The brighter room or out doors, the light reflects back creating the mirror effect. In side the building where the glass acts like a window, is darker, so a small amount of light is transmitted through the glass.

However, when the conditions are switched such as at night or if the lights in the room with the mirror were turned off, or the rooms inside the building were made brighter, then the one-way mirror effect is lost and the glass becomes a window. At night this is very common, when the office lights are turned on, individuals can see perfectly fine into the building.

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