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How to Cut Glass

5 Tips to Improve Your Cutting

One of the fastest and easiest ways to improve your fused glass art and dramatically expand your design style is to develop your glass cutting skills.

The beauty of working with fusing is the simplicity of the medium. Many people come to the craft with little or no glass cutting experience. Due to the ease of fabrication and wealth of readily available information, they’re successfully producing attractive pieces from the start.

But if you’re now tiring of the simple cut and assemble methods that got you started and longing to move in a more advanced direction, a small dose of technique is the jump start you need.

It may seem like a trivial topic to address, but your project complexity is in direct relation to your cutting confidence. In other words, the better you cut, the more likely you are to venture outside of your comfort zone and take on more challenging projects.

Here are some tips to get you started. 

1 Consistent pressure.

Contrary to popular belief, it doesn’t take a heavy hand to make a good score line on glass. What it takes is consistent, medium pressure from the very beginning to the very end of the score. The glass cutter should, “sing” as it rolls over the surface of the glass. It’s a pleasant, consistent sound beginning to end. It’s not a cringing grinding noise. A good score is visible its entire length. But it’s not messy and littered with thin splinters. The grinding noise and splinters are signs you’re applying way too much pressure.

Many beginners start strong but let up the pressure as their hand moves farther away from their body. In this case, breakage tends to occur ¾ of the way down the score line. Beginners believe the score comes solely from the hand. A good score comes from making your wrist, elbow and shoulder one rigid tool. This combined strength and rigidity helps you apply consistent pressure the entire length of the score even at an awkward distance from your body. 

When cutting an unusually long piece, I turn the glass so I can run my score right to left instead of away from my body. This way I can move my body along with my hand and more easily maintain the consistent pressure needed for a successful break.    

2 Cut on the smoothest side of the glass.

In some cases, I prefer the look, color or pattern on the textured side of a sheet of glass. I turn the glass over and cut on the smoother side and then simply turn the glass back over when I assemble my project. The glass cutter wheel will have better, more consistent, contact with the glass the entire length of the score if you cut on the smoothest side. 

3 Beginning and end.

Try to start your score as close to the leading edge of the glass as possible without falling backward off the glass. Apply consistent, medium pressure from the very start. End the score as close to the far edge as possible without falling off the glass. Repeatedly falling off the glass edge will damage the cutter wheel and could possibly cause the glass to shatter.  

4 Use the right tool for the job.

Use a strip cutter or circle cutter when applicable. Accuracy is key for professional quality artwork. These tools give your work consistency. Plus, they save material by reducing waste and breakage.

When cutting strips, I cut a few more than I need and select the best, straightest strips for my project. The extra pieces find their way into smaller projects, pot melts or free flows. Nothing goes to waste.

Whenever possible, I opt to use running pliers over grozing or breaking pliers to break glass away from a sheet. Running pliers give the most reliable results. They work best if the glass being removed is at least as wide as the rubber tipped plier jaw. When breaking narrow or small curved pieces away, I choose grozing plies because the narrow jaw fits in tight places and allows me to get close to the score line.     

5 Use paper patterns.

Don’t hesitate to cut around a paper pattern to include an intricate shape in your work. This is a terrific way to transition away from strictly geometric designs and into pieces with lively organic elements.

Glass wants to break in a straight line. To cut rounded shapes, we make a series or gradual curves and break the excess glass away in steps until we have a glass shape that closely resembles our pattern.  

When cutting around a paper pattern piece, cut as close to the paper as possible without running into it. Beginners tend to cut a wide safety halo around the paper. It just postpones the inevitable. Be brave. Go for it. If the glass is going to break unfavorably the halo, no matter how heavenly, won’t prevent it.

Something to build on.  

The more time and effort you put into each step makes the next step easier and the finished product that much better. Don’t rush a project just to get it in the kiln. Give it the time it needs and produce your best work, every time. If you have to ask, “Is this good enough,” it probably isn’t. Do yourself a favor, re-do that piece or step. You can thank me later when you’re doing the, my piece came out awesome, happy dance.  

Go ahead. Cut it up!

Happy fusing!

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Fusing with Frit Webinar

November 28, 2023

Sheer Power by Lisa Vogt

Ramp up the visual intricacy of your glass art!

Clever glass fusers know that using strong line quality and bold color saturation in combination is an effective way to create stand-out works of art.

Now take such trustworthy techniques and sprinkle in gradient blends and subtle shading achieved using frit. You’ll be amazed just how quickly your artwork advances to a new, exciting level of sophistication.

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I demonstrate how to make SEVEN projects in this Webinar including a sea turtle, flowering tree, to beach scene and more!

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1 thought on “How to Cut Glass

  1. Thanks, I do enjoy your emails.

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