Note: Customers must understand that ONE WAY VISION also known as CONTRAVISION is a vinyl to be applied from outside that has tiny perforation and is not a magic formula where one can just see outside but outsiders cant see inside at all times. No, it does not work like that. It works where people in area of lesser light intensity can see to the area of greater light intensity hence it works best when the glass window or door is to the exterior side and also note that the effect will reverse at night time so outsiders will then be able to see clearly inside whereby insiders will not be able to see outside. Same effect will be with solar films that are applied mostly on car windows. Contravision will have no effect if applied in the inner part of building or offices like the corridor, walking passage, between 2 office partition in the inside of the building or bank if light or brightness intensity is equal on both sides. If its done, it will just be a waste.