Seam Allowance

While making a pattern, it is always important to remember to allow space for the seam, as you can’t sew right on the edge of the cut fabric or else it will fray. This is what is known as the seam allowance, seam allowance is the area between the stitching and edge of the fabric.On patterns the seam allowance is most often marked by a small notch which indicates how far from the edge the stitching line is to be sewn. On patterns for home use the seam allowances are sometimes unfortunately not marked on the pattern, leaving the sewer to rely on the make instructions.
Seam joins more than one pieces of fabric. All layers of fabric sewed together must have the same seam allowance, the raw edges must line up evenly to create an equal seam allowances on all of the pieces being joined.The basic principle of seaming is; two pieces of fabric are laid on top of each other and a needle and thread goes back and forth along a line, joining the two together.
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