Because of the way that fabric is woven out of thread, it can easily come apart into its constituent threads at the edge of the fabric. The zigzag shape of an edge makes it slightly harder for the fabric to come apart.
The shears are called "Pinking Shears"
Used to finish edges of cloth with a zigzag cut for decoration or to prevent raveling or fraying.
scissors with zigzag edges on them. they are in the scissor isle.
There are scissors used in sewing called Pinking Shears that are used to cut out seams, and yes they prevent fraying. These scissors are to be used for fabric only. To use otherwise would dull the scissors edge. There are also craft scissors with a zig zag patterned edge used to make decorative edges for use on paper only. These scissors do not work on fabric.
Don't know present nomenclature but the scissor like hand tool with serrated blades used to apply a zig-zag edge to textiles used to be called "Pinking Shears". My mother had one and I purchased one when learning to sew.
An edge that has a zigzag cut on it is Les likely to fray.
Serging or zigzag stitching a fabric keeps the fabric from unraveling.Serging trims the loose threads and encloses the edge in a thread casing.If a serger is not available, zigzag stitching the edge will enforce the fabric edge and keep it from unraveling.
A curved edge and a straight edge which makes two edges
The edges of the circles are the the the edges.
edges are the intersection of faces in a three dimentional figure:The cube has 12 edges.
The cut produced by pinking shears may have given its name to (or be derived from) the plant name pink, a flowering plant in the genus Dianthus (commonly called a carnation). The colour pink may have been named after these flowers, although the origins of the name are not definitively known. As the carnation has scalloped, or "pinked", edges to its petals, pinking shears can be thought to produce an edge similar to the flower.
A curved edge and a straight edge which makes two edges
A curved edge and a straight edge which makes two edges