What is a Two Way Mirror? — 3 Simple DIY Methods
When people think of a two way mirror, I feel like the first things to come to mind are either horror movies or interrogation rooms. While these uses are definitely up there on the list, that’s only a fraction of the uses for a two way mirror.
A two way mirror, also known as a one way mirror or a half-silvered mirror, is a transparent mirror that is reflective from one side and transparent from the other.
Two way mirrors are definitely a worthwhile investment for certain situations, but they can be a bit pricey.
This being said, let’s talk about how to make our own two way mirror using clear glass, acrylic, or neither.
I’ll go over 3 DIY methods for making your very own two way mirror, and how to avoid mistakes that’ll end up wasting your time and your materials. If you don’t want the hassle of a DIY project, you can order a two way mirror here, on our website!
Method #1: Applying Film to Glass and Acrylic
Ordinary glass or acrylic can be turned into a two way mirror by applying transparent mirror film, also known as two way mirror film. Window film doesn’t sound like it would be very dependable, but it actually provides maximum security and can even protect you from harmful UV rays.
A window film installation kit can be purchased from your local hardware store to help you with a speedy installation. At the very least, you’re going to need a squeegee to smooth out the bubbles!
Two way mirror film also allows you to create curved surfaces for exhibits costumes, or even your vehicle. If you’re going to be installing the window tint in your car, make sure you’re complying with your local tinting percentage laws.
Method #2: Stretching Film Across a Frame
This method is one of my favorites. Not only is the finished product amazing to see, but it’s also just a really neat process in general. If you need an extra lightweight mirror that’s totally shatterproof, mirror film is the way to go — again.
This time, however, you’re going to be stretching it across a frame with no glass. Yup, you read that right. We actually just tried this method out in our office to see what all the hype was about, and it looked so cool.
To start this off, you’re going to need mirror film, an empty frame, some sturdy tape, a staple gun, and a heat gun (or a good hairdryer). You’re going to pull the film with equal tension on all sides and secure it to the frame with tape.
Then, you’re going to staple on top of that tape, making sure to avoid stapling directly onto the film. This will give the staples a more sturdy foundation. The staples and tape should be at least a few millimeters below the edge of the frame. You will do this on all four sides.
Next, you will need to put another layer of tape on top of the previously laid staples and tape. Then, another layer of staples on top of that. When going through this process, try to pull the film as tight as you can to avoid wrinkles on the “mirror” part.
The last step is to use your heat gun to get out any slight wrinkles or imperfections, but don’t hold it too close or it will scorch your film.
Voila, there you have it! Your very own glassless mirror. If you’re having a hard time getting wrinkles out, remove a few staples and pull the film tighter in those areas.
Method #3: Silver Nitrate
Also known as a process called silvering, a thin layer of silver nitrate solution can be applied to the surface of the glass. You can find installation kids online! It’s a fairly simple process, and shouldn’t be too expensive.
The more silver nitrate that is applied to the glass, the more reflective and less transparent it becomes. This being said, if you wanted to make a standard mirror rather than a two way mirror, apply more silver nitrate!
As with any chemical, it’s extremely important to read all safety instructions before you start your project. Make sure you’re using gloves, safety goggles, and working in a well-ventilated area.
If the chemical aspect of this project seems like a little more than you were bargaining for, we recommend sticking with mirror film.
What’s the Difference?
A lot of people ask, “What’s the difference between a homemade two way mirror and purchasing a glass two way mirror?”.
A glass two way mirror is manufactured with a multilayer process in a vacuum chamber. There is a dielectric layer that enhances reflection, prevents tarnishing, and improves durability.
A homemade two way mirror is most likely made with one of the methods you just read about. Just like with any DIY project, it’ll definitely get the job done but there is more room for error. You might have to try a couple times before you get it just right, but don’t let that stop you. Happy crafting!
