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Sputter films are manufactured using various types of metal alloys and sputtering them onto a layer of high clarity polyester film. Some of the metals that are commonly used are nickel, chrome, stainless steel and copper. In addition to the metal used such as nickel and chrome, pure silver is added into the mix. The layer of silver deposited onto the polyester increases the heat rejection capabilities of the film dramatically. These metals provide good heat rejection and are very stable by nature. This helps to eliminate the possibility of oxidation within the film for a better lifespan. 

The advantages of sputter window films include:

1. Energy efficiency: Sputter window films can help reduce heat transfer through windows, resulting in improved energy efficiency and lower cooling costs.

2. UV protection: These films can block a significant portion of harmful ultraviolet (UV) radiation, helping to protect occupants and furnishings from sun damage and fading.

3. Glare reduction: Sputter window films can reduce glare caused by direct sunlight, improving comfort and visibility indoors.

4. Privacy: Sputter window films are designed to provide privacy by obscuring the view from the outside while maintaining visibility from the inside due to various VLT%.

5. Fast Cooling :  Sputter Film have several layers of iron particles in between the film that makes the film have great cooling perrfomance, similar to computers heatsink.

It's important to note that sputter window films can vary in terms of their performance, durability, and specific features. Different manufacturers may offer a range of options with varying levels of heat rejection, UV protection, and other functionalities. It's advisable to consult with window film specialists or suppliers to determine the most suitable sputter window film for your specific needs and preferences.