Cutting gentle curves and deep concave cuts is one of the most rewarding milestones in stained glass art. Follow this step-by-step guide to score and break curves smoothly without cracking your glass.

Step 1: Pattern Transfer & Alignment

Trace your pattern line onto the smooth side of the glass using a fine-point permanent marker. Place your glass flat on a clean cutting mat.

Step 2: Scoring the Curve

Hold your pistol grip or pencil cutter firmly. Start from one edge of the glass sheet and follow the curve in one continuous, fluid motion. Do not pause mid-score!

Step 3: Tapping the Score Line

For tight inner curves (concave cuts), turn the glass over and tap gently beneath the score line using the brass ball end of your cutter until a faint crack appears along the line.

Step 4: Using Grozing Pliers

Use grozing pliers to gently nibble away excess glass along deep curves for a perfect fit before grinding.

Explore EF Art Glass’s range of Precision Cutters & Pliers designed specifically for intricate curved cuts.