Gimp wire is used not just to protect the threads from the sharp edges of bead-holes but generally, to protect stringing threads from metal loops and jumprings, from fraying, and to give the finished article a more professional look.
French wire is from extremely fine coiled wire. At first glance, they look like a very smooth and closely linked fine chain. It is very delicate, soft, and flexible to the touch. They are most frequently used with silk threads and pearls.
And mainly to finish off jewelry pieces between the crimp and the clasp and/or other metal components.
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