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How Are Metallic Films Coated?

Metallic films are generally polymer films covered with a thin protective layer of polymer, typically aluminum. The protective layer is transparent so viewers can see the film material beneath, but in addition to being transparent, they often include a special coating to prevent reflection. They offer a sleek metallic look similar to an aluminum foil at a much lower cost and weight. However, since the films are transparent and have a protective coating, they tend to produce a washed-out, lackluster effect. In addition to allowing visibility, the protective layer on Metallized film also allows heat to be absorbed by the film, which minimizes the risk of burning. The thinner layer of polymer on traditional film, in comparison, allows more heat to pass through the film, increasing its risk of being burned. This problem is particularly apparent when the film is exposed to bright sunlight. Metallized films do not allow this type of light to pass through, resulting in a clearer, more even picture and a cooler, crisper image. Some films that are specifically designed to be viewed under direct sunlight include those made from rare gemstones. To improve the clarity of the film, some companies add a layer of aluminum oxide to the protective layer. Depending on the quality of film coating and the type of coating applied, a layer of aluminum oxide can improve the color of the film by neutralizing or removing redness caused by strong sun or UV light. Certain blue films, however, will appear bluish under such a condition. Companies that coat their films with aluminum oxide have found a way to control blue colors within the spectrum of visible light, making them much brighter and less susceptible to streaking. The films with Polyimide are able to produce a high-quality image at a lower cost than with other methods of film coating. Using this type of film coating equipment, producers can produce high-quality results without using as much Polyimide. As a result, the cost of Polyimide film coating is substantially lower than with traditional methods of film coating. Metals, including nickel and copper, are widely used in the production of these films. In addition to providing protection from the elements, these metals allow the texturing processes to be used on a wide range of surfaces. Therefore, they can be applied to almost any surface and produced in different colors and shades, depending on what is needed. With new technological developments, the color options with these films continue to grow as well, offering a wider range of color options for manufacturers.
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