... : 400*500mm,1830*2440mm etc. Two-way mirrorIntroductionA two-way mirror (also, one-way mirror or one-way glass) is a mirror which is ... darkened side but not vice versa. The glass is coated with, or encases, a thin and almost-transparent layer of metal ... the lit side.Applications:Such mirrors are used for one-way observation, with the viewing room often kept dark by a darkened ...