How to Polish Glass Edges After Cutting – 3 Easy Ways

If you are into any kind of DIY projects, chances are that you have had to or will eventually have to work with glasses. In most of these cases, you will need to cut the glasses. When glass is cut, its edges are usually broken, uneven and jagged. For aesthetic purposes as well as for your safety, you need to know how to polish glass edges after cutting.

There are quite a few ways you can polish glass edges. You can sandpaper, drills, and silicon carbide to smooth the jagged edges of the cut glass out.

So, without wasting any more time, let us take a look at the methods you can use to polish the jagged and uneven edges of cut glass.

How To Polish Glass Edges After Cutting: 3 Straightforward Methods

As mentioned above, unpolished edges of the glass are not only unaesthetic but dangerous as well. So you need to smooth them out before proceeding with any kind of project. The methods which you can use to do this, are given below.

Method 1. By Using Sandpaper


Sandpaper for glass is a very good and effective choice to polish glass edges, especially glass bottles. Sanding glass bottles after cutting is a great way to make them safe and look better. Let’s take a look at how to use sandpaper for this purpose.

i. Making the Sandpaper Wet

Before using the sandpaper, first, you have to wet the sandpaper you are using. Sanding glass with sandpaper requires the sandpaper to be made completely wet.  Then lay the sandpaper on a durable working surface. As for how to wet the sandpaper, first put the paper into a water container properly and then sprinkle some more water afterward. In case you don’t have wet sandpaper, use emery cloth.

ii. Placing the Glass onto the Sandpaper

After you have made the sandpaper for glass bottles wet, it is time to place the said bottle onto the sandpaper. Wear safety glasses and goggles and with the dominant hand, hold the bottle. Then holding the sandpaper with your non-dominant hand, place the glass on the sandpaper. You must place the edge that has been cut onto the sandpaper.

iii. Smoothing the Edges

Now we come to the part that matters most. After you are done placing your glass, applying gentle pressure, rotate the glass for about 5 minutes. Keep the rotating cycles constant to make the sanding uniform. Failure to do so will result in the glass being polished non-uniformly.

iv. Sanding the Inner and Outer Edges

After you are done sanding the cut edge, now it is time to polish the inner and outer edges. Sanding glass edges by hand is the best way to do so. Make the sandpaper wet again using the previous method and taking it with your dominant hand, rub the edges with it. Rub it in a backward and forward motion until the corners become smooth.

v. Using Sandpaper of Different Grits

Now you have to repeat the process using sandpapers of different grits. Using sandpapers of 150, 220, 320, and 400 grits will make the glass smoother. After that, finish the process off by using 1000 and 2000 grit sandpapers.

Method 2. Using a Drill

A Electric Drill

You can also use a drill to polish your glass edges. You need a sanding attachment for this.

i. Using A Sanding Attachment

Before you use your drill for polishing the edge of a glass, you will need to attach a sanding attachment to it. It is recommended that you use sandpaper with 60-100 grit and the attachment be a bit large. It is also imperative that the sanding attachment is of the right size so that it can fit inside whatever glass object you are working with or on.

ii. Using the Tool

Now holding the tool with your dominant and the glass with your non-dominant hand, start the tool by pressing the power button. Use the side part of the attachment on the inside edge of the glass. You don’t need to apply any pressure to the glass, because doing so will crack it. Continue smoothing all around the glass to completely polish it. It will take around 3-5 minutes to complete the process. Always remember to wear protective goggles and a mask while doing this.

After you are done polishing the inside of the glass, take the attachment to the outside edge of the glass and repeat the process. Doing so will give your glass a more rounded edge. Use fine-grit sandpaper to finish polishing your glass.

Also Read: How to Sharpen a Drill Bit – Quickly & Easily Ways.

Method 3. Using Silicon Carbide

Silicon Carbide

If you don’t want to or can not use sandpaper, you can also use silicon carbide to polish your glass. The steps you need to follow are as follows :

i. Preparing the Work Surface

First, you must prepare the work surface accordingly for this procedure. The chief work surface you will use is float glass. Place it on top of some foam rubber which will make sure the float glass stays in place to make your work easier. In absence of float glass, scrap plate glasses such as a window or mirror glasses can also be used.

ii. Applying Silicon Carbide to the Work Surface

After you are done preparing the work surface, pour some water on the center of it. Pour enough water to create a little puddle and then just the right amount of silicon carbide in it. Then stir the puddle with your finger so that the water and silicon carbide mixes properly.

iii. Polishing the Glass

Now place the glass on the puddle in such a way that the sharp edge is faced down. Holding the glass with the dominant hand, rotate the glass for about a minute in a motion that resembles figure 8. Always wear protective gloves so that you don’t cut your hands on the glass.

Now wipe the glass off with a towel. Take a piece of wet sandpaper and smooth the inner edges of the glass out with it.

Final Words

If done properly, the arts involving glass are a thing to behold. But they are very delicate and dangerous. But if you know how to polish glass edges after cutting, it will go a long way to making your life easier. But no matter what method you follow, always make sure that you are taking the proper precautionary measures.

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