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Curved sewing needles were created for repairing fabrics like lampshade fabrics. They are also used in sewing upholstery fabrics, fabric boxes, and creating crafty stitches.
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No matter the type of needle you are using, the first thing to do is to thread it.
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After threading the needle, make a knot. The knot should be large enough to not go through the seams.
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If you are working with a very thick material, you may want to get a plier or some other tool with a strong grip.
LITTLE HINT
Covers for your cushions
Upholster your coffee table
Make a bed skirt