The notcher is a common precision tool with a cutting blade that slips into the edge of the pattern, leaving about 1/4 -inch U shape cut-out (notch). The notches are then marked on the fabric and the cutter slashes the fabric at these points. Finally, the garment parts are assembled and stitched following the notches. The notcher is made of good quality metal for long performance and consists of spring action handle.
The notches in the pattern is used to indicate seam allowances, centre lines, identifying face up or down of the fabric, align pattern pieces, dart intake, extended shoulder tip, zipper stopping point, fold back of facings and hem, insert placement, tension release in acute curves, inverted corners etc., thus acting as an instruction guide for seamstress sewing the pattern.
a and b notches