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Arc Audio

Is Darker Window Tint Better?

August 16, 2017 By 1sixty8 Leave a Comment

Darker Window TintIn 1966, 3M developed the first window tinting solution to reflect the heat energy of the sun away and help keep the interior of your vehicle cool. Dozens of companies now manufacture window tint films and each has several different series of films with varied performance offerings. In the last few years, many companies have begun to offer window films that provide exceptional UV and IR energy reflection while allowing visible light to pass into the vehicle. Read on for a closer look at why darker window tint isn’t necessary to improve the comfort of your car, truck or motorhome.

Where Does the Heat Come from?

Most people think of the sun as a light source, but it is also responsible for a broad spectrum of electromagnetic energy. The majority of the energy that reaches the earth is visible light. There is also ultraviolet (UV) and infrared (IR) energy.

Darker Window TintUV energy causes sunburns and the coloring and dyes in materials to fade. IR energy is at the opposite end of the solar energy spectrum from UV energy. Infrared energy extends from the top of the visible light spectrum at 430 terahertz to beyond 300 gigahertz. Slightly more than half of the energy that reaches the Earth’s surface is infrared and is responsible for heating our planet and, subsequently, the interiors of our vehicles.

The heat energy produced by the sun is about 1,000 watts per square meter (equal to 10.76 sq. ft.) on the Earth’s surface in clear conditions. Luckily, our atmosphere blocks more than 70% of the total solar ultraviolet energy from reaching the surface. If it did not our lives would be much less comfortable.

Let’s Talk about Film Darkness

Darker Window TintVisible light transmission, glare reduction, shade or darkness – whatever term you see quoted, they refer to how much visible light will pass through a film. A higher number represents the transmission of more light – 100% would be an entirely transparent film and 0% would represent a coating of black paint.

While it seems logical to want a dark film to keep the light and heat energy out of our vehicles, window films block light transfer in both directions. A dark film can make it harder to see around you at night. Choosing the best film for your application requires balancing how dark you want, local laws and, of course, your safety.

How Clear Window Films Work

Constructed of many layers, each with different properties, modern clear films are designed to reduce the transmission of infrared energy into your vehicle. It is hard to directly quantify the amount of heat energy that is blocked, because visible light is also responsible for heating. What we do know is that clear solar control films block significantly more heat energy for a given shade than conventional dyed, carbon or metallic films.

Is Darker Window Tint Necessary?

Darker Window TintWithin a particular series of window films from a manufacturer, a darker film offers more Total Solar Energy Rejection (TSER). Let’s look at the Black film series from Autobahn. Their Black 50 49% visible light transmission (VLT) film provides 30% TSER. Stepping up to the Black 30 film, rated for 31% VLT, solar energy rejection is rated at 36%. Their darkest film, called Black 05, offers 5% VLT and 43% total solar energy rejection. As you can see, darker films block more solar energy within the series.

To contrast this example, let’s look at the Ceramic Series from Huper Optik. Their Klar 85 film allows 85% of visible light to pass into your vehicle, but provides an incredible 32% TSER. You are right in thinking that it offers the same net performance as the Black 50. If we look at Ceramic 50, which is rated for 50% VLT, the TSER is an impressive 50%. Yep, that outperforms the Black 05. At the top of the Ceramic range is the Ceramic 05. This film has a 6% VLT rating and provides 75% TSER. That is more than 1.7 more energy rejection than Black 05.

To directly answer the question, darker films within a series block more energy. When comparing different brands of films or different series, the materials and construction used to manufacture a film determine its performance.

Comparing Specifications

Darker Window TintTrying to determine the best film for your vehicle can be tricky. Film manufacturers, just like any other industry, like to manipulate specifications and terminology to produce figures that look impressive. When it comes to blocking thermal energy, the reflected or block infrared energy specifications are often generic or specified in a narrow band of IR frequencies. These inconsistencies make apples-to-apples comparison difficult. However, you can be confident that within a manufacturer’s range of products, unless explicitly specified, performance differences between shades and series will all be provided using consistent measurement techniques.

Install Comfort with an IR Blocking Window Film

As a general approach, if keeping the interior of your vehicle comfortable is your primary concern, then look for a ceramic or clear film solution. These products are designed to help make your vehicle more comfortable and ease the load on its air conditioning system. As a by-product of their premium status, ceramic and clear films often carry a lifetime warranty against fading, discoloration (turning purple), bubbling, peeling or cracking. You may invest a little more money upfront, but you can be confident that the film will offer protection and comfort for many years.

For more information about premium window films and having some installed on your vehicle, contact your local mobile enhancement retailer.

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Filed Under: ARTICLES, Resource Library, Window Tint Tagged With: 3M, Autobahn, Huper Optik

About 1sixty8

1sixty8 media is a content marketing, website development, and business solutions provider specializing in the mobile enhancement industry. The 1sixty8 media team includes many household names in the industry, from store owners and industry writers to award-winning installers and fabricators. To learn more about 1sixty8 media, visit www.1sixty8.com.

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