カッティング
curved cut
Japanese: 曲線カット
Score along the curves—either freehand or using a template—and break along the score lines.
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Curved cutting is a technique for cutting glass along curved lines, such as arcs, S-shapes, or wave patterns. Unlike straight-line cutting, this method does not use a ruler; instead, the cutter is moved freehand or guided along a template. Because the crystalline structure of glass makes it prone to breaking in one particular direction, it is important to be mindful of the relationship between the direction of the curve and the direction in which the glass is most likely to break.
It’s easy to make a mistake when trying to cut a sharp curve with a single score and break. The basic method for curve cutting is to first make multiple “escape scores” on the outside of the curve and then cut them away one by one. Any remaining minor irregularities are smoothed out by grozing. For difficult curved shapes, another method is to use a carving bit with a router to carve them out.
Related Concepts
By combining a grozer, running pliers, and a table router, you can precisely finish pieces with complex curved shapes.
By combining a grozing, running pliers, and a table router, you can precisely finish pieces with complex curved shapes.
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.