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The purpose of finishing is to adapt sewing thread to a specific end use. The type of sewing machine and the materials to be stitched require finishes that will give the thread maximum efficiency. A seam should be stronger than the material itself. Each sewing operation must be individually considered... the number of stitches per inch, the proper selection of needle, the size of thread and the finish on the thread (a finish to permit it to enter the seam with the least abrasion possible). It is not enough to know the tensile strength of a thread; the vital factor is how much of the original strength remains in the thread when in the seam.
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