Highest “Glare Rejection” Window Films Available

Klingshield Technical News
Johannesburg South Africa July 2011

Glare is known as visible light in the spectrum of the sun. It is the part of the sun we see but cannot touch. When equating the amount of glare rejection one can obtain out of a window film, we talk about “total visible light rejected”. Total visible light rejected is the amount of glare that we keep out from coming into a building through the glazing system.

Visible light transmittance is the ratio of the amount of total visible solar energy at between 280 and 780 nanometres that is allowed to pass through the glazing material. The value is expressed in a percentage. Glare is influenced by visible light transmittance through any window.

A certain portion of visible light is also reflected by the glazing system. The best performing film on glare rejection is the Grey 5 non reflective range. This cuts out 95% of the glare, only allowing 5% to be transmitted.

The next best performing film on glare will be the Charcoal Charcoal high performance film with a 92% glare rejection, only allowing in 8% of the visible light. This Charcoal Charcoal 5 high performance film is the best all round performer as it stops 92% of the glare and 62% of the total solar energy allowed to pass through windows.

Herewith other product specifications for glare rejection

 Blackout window film cuts a100% of the glare (but is not see through, whereas all the other films are see through)
Grey 5 non reflective cuts out 95% of the glare
Charcoal Charcoal 5 cuts out 92% of the glare
The Grey reflective film cuts out 93% of the glare
Bronze reflective cuts out 92% of the glare
Silver 20 reflective film cuts out 85% of the glare

All the above products have been measured in accordance with Aimcal and Ashrae standards.

Glare is a major problem for personnel who work in offices or home owners who spend a lot of time in front of their screens. Glare on screens create bloodshot eyes and sometimes double vision. Doctors have warned that while the increased use of computers may be good for technological advancements, this is having a negative effect on people’s eye health, with more people reporting strain related eye problems such as eye fatigue, headaches, etc. One solution to these problems is to reduce the amount of glare which will reduce fatigue and sore eyes. Medical experts estimate that this condition affects between 80% and 90% of people who spend about 3 hours or more a day at a computer. Glare is also from artificial light reflected off the computer monitor and window film with high glare rejection is becoming more and more popular in offices and homes.

Prevention is better than cure!

For further information on glare rejection in our other range of window films please contact us

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