By now you’ve probably noticed the rise of plastic screen protectors.
Most of them are made from a plastic-and-aluminum material called PET (polyethylene terephthalate).
These protectors have become so popular that they’ve started appearing in other materials.
But how many of them actually protect your computer screen from external sources?
Well, that’s where the science comes in.
In a new paper, researchers from the University of Texas at Austin report that they have developed a test that allows them to measure the amount of chemicals on a computer screen.
The test can also tell you whether a screen has a high enough degree of protection.
They’ve found that the PET-based screen protector has a protective effect of between 25 percent and 80 percent against some external sources of light and heat.
So, the best protection from external heat is likely in a PET screen protector.
You can buy PET screen protecters online and at most electronics stores, but you’ll have to go to a store where they’re marked with a small sticker.
In fact, the sticker on the PET screen shield looks like a cross between a cigarette lighter and a cigarette can.
This plastic shield is used for all types of screens, from LCD screens to desktop computers to cell phones and more.
So the study authors used the PET shield to measure all the chemicals that are emitted from screens.
They then tested the results using a high-resolution electron microscope to see how much of these chemicals was absorbed into the screen.
They found that, on average, the screen shield absorbs about 2 percent of the chemicals on the screen, but that’s only about 10 nanometers wide.
That’s only one percent of what the screen should be able to absorb.
To put that in perspective, if your screen were a square inch, the surface area of that square inch would be about the width of the palm of your hand.
In other words, it’s a pretty small screen shield.
So if you were to put a PET shield on a phone, it would be roughly the same size as a regular phone.
That means it’s probably pretty effective.
But this is not the end of the story.
The researchers also tested the screen with another type of PET screen, and found that even with a smaller screen, the shield could absorb more than 70 percent of any incoming light.
That makes the PET film about one-fifth as effective as a normal screen.
This means that if you want to be as protective as possible, you should try to keep your screen as small as possible.
There’s also some good news.
The study found that this protective effect was more likely to be seen on the sides of the screen than the top or bottom.
This is because the protective effect is only seen when the screen is exposed to the maximum amount of light.
For example, if you have a screen facing up, it will absorb about half the light, and when exposed to light from the top, it absorbs only half of the light.
You could probably also think of it this way: when you’re playing a video game, if the screen facing down is lit up, you can get the best performance.
The paper is available online.
The authors also hope that their results will help companies make better screen protecter designs, which might help them to reduce the amount and types of light they can use.