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One Way Film and Glass - the facts._1663


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One Way Film and Glass - the facts.,ghd planchas

"I want to see out,ghd, but they won't be able to see in" is a common request heard almost on a daily basis by anyone involved in the business of supplying or installing window film or reflective glass. The reality however is quite different than simply applying a layer of reflective window film to a pane of glass to achieve "one way vision". The secret lies not in the film or the glass but in the prevailing lighting conditions.

Buildings with "mirrored" windows are now a common sight in most of our towns and cities. This is usually glass treated at point of manufacture with a reflective coating or windows that have been retrospectively coated with a reflective solar control window film. The reason why these windows appear mirrored from the outside and transparent from the inside is partly due to their metallised coating but mainly down to the differential in external and internal light levels.

The installation of reflective film or glass within the external facade of a building does indeed afford privacy to the occupants but only during daylight hours. However during the hours of darkness with internal lighting in operation the windows become "see through" from the outside.

Because external facing windows often only require "one way" vision during daylight hours, Night time transparency is not usually an issue.

When the requirement for "one way vision" concerns internal glazing such as office partitions or vision panels the effect is much more difficult to achieve and in may cases impossible. Unlike external glazing,bolso louis vuitton, internal windows usually have similar amounts of light present on both sides of the glass. Should the light differential between the "private" side and the "viewing" side be less than a ratio of 1:7 this will probably result in total transparency or total obscurity from both sides no matter which way round the film or glass is installed.

Picture the scene in any TV crime drama where an identity parade is taking place. The line up always stands in a brightly lit area and the viewers are always in a darkened room observing through "one way" glass.

To overcome this issue in an office environment,manolo blahnik precios, additional lighting should be introduced to one side of the glass or alternatively the amount of light on the opposite side should be greatly reduced.

There is absolutely no exception to this rule. One way vision glass does not work by magic but simply by the laws of science.

Copyright © 2010 Richard Lancaster

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