Frequently Asked Questions about Window Film
Solar safety/security films can also contain high-performance metals and alloys which enhance their heat and glare reduction properties. Although all films are safety films, this series works like an invisible shield, helping glass resist penetration as the result of an accident or premeditated act.
As it protects people and property, it also helps protect against the relentless fading and deterioration of furnishings caused by UV rays. All of ProTINT‘s safety films meet or exceed the requirements set forth by the American National Standards Institute (ANSI) in Z97.1-84 test break safe characteristics. The ability to secure a building or home has become a major concern. With our experts and films, being secure does not have to look ‘ugly’.
While it is true that some window films are not suitable for sealed units, there are many films on the market today that are designed to be installed on these units.
The Window Film Committee of the Association of Industrial Metallizers, Coaters, and Laminators (AIMCAL) commissioned A. William Lingell, P.E., a technical consultant to the Sealed Insulated Glass Manufacturers Association (SIGMA), to conduct the standard ASTM tests (E773 and E774) on standard sealed units with and with-out window film.
Based on the testing conducted on these units, window film had no observable effect on the performance of high quality manufactured insulated units.
- Thermal Stress- from absorption of solar radiation.
- Tensile Stress- from the weight of the glass itself.
- Technical Flexing Stress – from wind.
- Impact Stress – from flying objects, hail, baseballs.
- Twisting Stress – from buildings or window frame sagging or settling.
The first type, thermal stress, is the only one which film may affect. The use of window film will increase the thermal stress on sunlit glass; however, different types of glass have different solar absorption rates and will withstand different degrees of thermal stress.
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The second type is a more complex system of multiple layers and conductive coatings deposited on glass after it has been made. This type of low E glass gives heat rejection of 30% -50% in addition to reducing heat loss.
Adding window film can drastically increase the heat rejection. Also, on average, low E glass only filters 56% of the damaging UV rays, while our films have the ability to filter 99.9%. The combination of Low E glass and window film can be the best overall system in some climates.
Although there are some obvious guidelines in determining what, if any, effect window film will have on a plant (for instance, dark green plants need more light than lighter colored ones), there is a simple test which can be done prior to film installation; that is, merely move the plant to an area with less sunlight for a few days. In addition, most nurseries or local agriculture agencies can advise you whether a particular plant needs closer to maximal or minimal light.
And no, not all films are designed to look that way. With the advances in manufacturing techniques in recent years, the option of having an energy efficient film with little or no color that is virtually invisible and neutral in appearance is now available.
Sunlight is basically made of three elements:
- Visible light – the part that we ‘see’.
- Infra Red – the part which we ‘feel’ as heat.
- Ultraviolet light – which we neither see nor feel but is the main factor in causing fabrics and furnishings to fade. Ultraviolet absorbers are used to stop UV at the film. The type, amount, and location of the absorbers in the product determine the film’s ability to reduce fading. Absorbers that are located in the adhesive only (blocking 95%-98%) instead of the film itself (blocking 99.9%) are far less stable and enduring. All of our solar control products absorb more than 99% of the UV rays.
FACTS ABOUT FADING : “As a Rule of Thumb”
- UV LIGHT causes about 40% of the fading
- HEAT causes about 25% of the fading.
- VISIBLE LIGHT causes about 25% of the fading.
**MISC. (there is about 10% that falls here for a variety of reasons) See Below:
**Laboratory studies of a large variety of fabrics and woods show significant differences in the color stability of these products. Fabric fading results differ depending upon fiber type, dye, color, stability, and/or pattern printing techniques. Expensive fabrics are not necessarily a guarantee of fade protection. Natural wood finishes are much more stable than stains or finishes that alter the natural color of the wood. Wood may actually darken with prolong exposure to UV rather than fade to a lighter color. The nature of certain delicate fabrics and dyes will lead to premature fading regardless of the application of any window film or protective treatment.
**These answers are based on information given by the Association of Industrial Metallizers, Coaters, and Laminators (AIMCAL).**