カッティング
straightedge
Japanese: カット用定規
A tool used as a guide for drawing straight lines. Run a utility knife along it to cut.
Learn More
A straightedge is a ruler used as a guide when scoring straight lines with a glass cutter. They are typically made of metal (stainless steel or aluminum), and types with non-slip rubber on the back are recommended for ease of use. Wooden rulers are not suitable for use with glass because the cutter’s blade can damage them.
Place the ruler against the front side of the glass (the side you won’t be cutting) and run the cutter along the ruler to score the glass. If you don’t apply even pressure with your fingers to hold the ruler in place, the score line will curve, so it’s important to use your entire body’s center of gravity to keep it steady. Since the ruler may not be long enough for long, straight cuts, be sure to have a ruler that matches the maximum size of your project.
Related Concepts
Use it in combination with straight cuts, a glass cutter, and scoring. For curved cuts, do not use a ruler; instead, cut freehand or use a template.
This entry is written in Japanese by Rei Chikaoka and translated for readers outside Japan. If something reads oddly, the original is the source of truth.