One-way mirrors, Originally called transparent mirrors, are made when a thin metallic, reflective coating has been applied all over the glass. This thin coating is referred to as a half-silvered surface because the reflective molecules in the coating make the mirror half opaque. The half-silvered surface makes it so if lighting hits the mirror, half the light is reflected back and half shines through.
Because of this, no true one-way mirror exists. In order for one-way mirrors to work effectively, one side of the mirror must be brightly lit and the other side must be dim or dark. To ensure that the one-way mirror provides the utmost privacy, we can:
-Verify the amount of light on the mirrored side of the glass is at least twice as bright as the transparent side
-Strengthen the mirror by tempering the one-way glass
-Add tinted glass to increase privacy
-Offer different glass thickness ranges
