Tinting a one-way mirror

Method 1: If you want a prison-style one-way mirror in a room, you need to make sure that the “viewing” side of the glass (The side of the glass that you want to be see-through) is darker than the “mirror” side of the glass. You need to be able to apply the film on the “mirror” side of the glass using a film somewhere around 5%, possibly double-layered depending on the lighting. You can get away with some lighting on the “viewing” side but it has to be significantly lower than what’s on the other side in order to maintain the mirror-like effect.