SOMETHING WHAT I KNOW ABOUT TINTING
Ok! Lets talk about tinting! Living in Dubai we think, we know everything about it. So-What methods can we use to cool our cars?
Here we will talk a little about science of car window films.
On a summer day, the temperature inside of your parked cars can quickly reach shocking levels. We measured that the cabin air temperature in a gray car can increase by nearly 35C degrees in just an hour!
The interior air temperature increases because the heat from the Sun is able to penetrate into the car cabin but yet get stuck inside it.
To understand why this happens we need to dig a little deeper into the topic of solar radiation.
Solar radiation is the energy that is emitted from the Sun in the form of photons.
Electromagnetic spectrum. Solar radiation reaching Earth’s surface ranges from 290 to 2500 nm which is made up of three groups of wavelengths:
1_______UV (ultraviolet) —-from 290 to 400 nm,
2_______VL (visible light)——— 400 to 700 nm,
3_______IR (infrared) —————700 to 2500 nm.
Only the VL spectrum is visible to us.
So- now we understand the Solar radiation reaching the Earth is between 290 to 2500 nm.
That reach us in proportion typically,
UV counts 3% of total solar radiation, VL 43%, and IR 54%.
Because of its high energy levels- shorter wavelengths, UV is dangerous to health and can damage surfaces. VL we can detect with our eyes, it is visible to us. But Both UV and IR, are not visible to us. All these three -UV, VL, and IR, together contribute warming our a car cabin.
Here is Three most popular ways to cool the car.
1 – Additional air ventilators can be installed
But Tests showed that the air ventilation reduced temperature by a max of 7.4 degrees Celsius.
2 – Other popular method is the use of reflective curtains. They are highly effective to reduce dashboard and inside temperature by as much as 30 and 20 degrees Celsius. Compared to window tinting Films, curtains shows surprisingly far higher result in cooling the dashboard!
Window tinting, for example, cooled the dashboard by an average of only 7 degrees Celsius (with a maximum reduction of 12 dgrs).
Nevertheless, with a time, the car cabin temperature under the protection of a curtains would eventually reach the same heat levels as that without a curtains protection.
A curtains placed only in the front windshield also offered little cooling effect to the rear of the car cabin.
3- Research have shown that window tinting gives the best heat rejection method. Tests to compared the car cabin temperatures protected with a window tint (85 and 65% IR rejection rates for windshield and the rest of windows) and that with a curtains (on all car windows). And we found that window tinting was more effective than the curtains. There was a little difference between the car cabin temperature with and without the curtains protection. The curtains only cooled the car cabin by an average of 2 degrees Celsius (with a max reduction of 6 degr. of Celsius), but the tint cooled by an average of 5 degr. Celsius (with a max of 8 degrees Celsius, for that type of Film).
Well, Window Film tint shows by tests that it is the overall best heat rejection method for cars. Plus unlike curtains and air ventilators, window tinting films no need manual setup and remove each time we park or drive our cars.
It is impossible to have a perfect 100% heat rejection window tint because this method would also require the complete removal of the visible light component
Ok! An effective window film is one with a high rejection rate for IR and UV and at the same time it will give you a comfortable VL level.
Choosing the right window film for our cars .
How window films works
Window films of the past were just vapor deposition of aluminum or silver metals. These metals were effective against blocking heat because they were very reflective, but because these films were very reflective, they also blocked out a large part of the visible light (VL) spectrum. These reflective films also had a “tin foil” look and were thus less aesthetically pleasing.
A car window film actually consists of several layers. The layers are typically the protective liner (discarded prior to installation), adhesive layer, polyester layer (which itself can consist of several layers), and a scratch resistance coat.
Window films have since changed rapidly. Modern window films today are lighter, longer lasting, and have high heat rejection rates but yet allowing in high visibility and reducing glare. The key goal of new CERAMIC window films is to reduce the transmission of solar radiation through the glass without impairing visibility.
The more the window film can reflect the solar radiation, the more energy efficient the film is. The film can also absorb the solar radiation to reduce transmission, but this is undesired because the absorbed energy can radiate inward and contribute to warming.
Window films today have UV (ultraviolet) inhibitors in them because the film’s polyester base can be destroyed by UV. That window films today have nearly 100% UV rejection rate is a double advantage because by blocking nearly all of the incoming UV, the window films will last longer (e.g., fade less) and the car occupants and car interior surfaces will be protected against UV harm. Different manufacturers may use different ingredients and additives but the basic method of making a window film remains the same. A window film might look like a single layer, but it is actually made up of several layers.
How to choose the right window film
There are many types of window films and many manufacturers out there. Consequently, it can be confusing to choose the correct window film for our cars. WE offers good advice on how to select good quality car window films is by iSHINE. Essentially, in choosing the correct window film for our cars, the following should be our guide.
A good quality window tint is not expensive when we consider the long term benefits they give
1. Choose a reputable window film company
2. Professionals will always have a TOOL to SHOW you the Film properties they offering to apply!
3. Choose the right window film installer or dealer Avoid unscrupulous dealers or car tint shops. Some unscrupulous activities include selling rebranded, fake, or so-called house brand window films, installing a different window film from what was earlier chosen, reporting false window film specifications, and presenting false demonstrations during window film selection.
4. Choose the window film with the highest heat rejection rate.
Once the window film company and the film dealer or installer have been selected, the next is to choose the film with the highest heat rejection rate. Two common heat rejection indexes used are IRR (Infrared Rejection) and TSER (Total Solar Energy Rejection).
IRR measures only the amount of IR (infrared) component that is rejected by the window film. So, if a film has a 65% IR, it means the film rejects 65% (but lets in 35%) IR. However, IRR does not measure the total amount of heat that is rejected.
Recall that all three components (UV, VL, and IR) of the solar radiation contribute to warming, not just the IR component.
We are using new type Ceramic films – as we decide its a best choice for our clients appears on a PRICE-QUALITY issue and offering a lifetime warranty on it .This film is a great option for first time car buyers or people new to window tint. This film is our nano carbon film with ceramic and has an IR rejection of 64% and higher. NaNoCarbon is an affordable option for a quality film that will keep its color over time and keep you cool, as well!