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How to Score Glass
Made Easy

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You can score glass into strips, geometric shapes, circles, ovals, curves and with a glass saw, almost any shape.

Before scoring glass, you will use a glass marker or permanent marker to draw the shape or line you want to score (cut).

Some Things to Keep in Mind When You are Scoring Glass

  • Warm glass (glass at room temperature) cuts easier than cold glass
  • It is necessary that the work surface is absolutely flat
  • Score glass on the smooth side rather than the textured side
  • Hold glass cutter in a vertical position as you would a pen or pencil
  • Don't use excessive pressure. Too deep of a score can result in a bad break
  • For protection, it's a good idea to wear glasses or another type of eye protection



Straight Cuts

When making a straight score, we have found it easier if you score glass from the point farthest from the body and pulling the glass cutter towards you.

Once a score line has been made, use running pliers (if strip is at least 1") by placing the running pliers centered on the score line and gently squeeze the handles. You will see the glass separate along the score line.

If you are cutting a narrow strip, it is sometimes easier to use breaker/grozer pliers.

Hold the stained glass sheet over an edge of a table with the score line slightly over the edge. Using the breaker/grozer pliers apply gentle pressure in a downward motion along the score line.

Another way of breaking glass along a straight score line is done by hanging the glass over the table edge and snapping it with your hands using a downward pressure.


Curves or Circular Cuts

To make curved or circular shapes, use your glass cutter to cut off sections. Glass likes straight lines or lines with gentle curves. Don't worry if the shape has some small projections, these can be removed via a nipper or the glass grinder.

There are cutting systems available for repetitive geometric shapes.

Learn More About Cutting Tools and Cutting Systems



Preparing Your Work Surface for Cutting

Having the proper cutting surface will help you avoid uneven scores and unexpected breaks. Click here to learn how to prepare your cutting surface.


Care and Maintenance of Glass Cutter

It is important to take proper care of your glass cutter. Although replacement heads are available, with simple maintenance, you can prolong the life of your glass cutter. Click here to learn how to maintain your glass cutter.

Ready to Foil?

Click Here to Learn How to Foil Stained Glass


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