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Reverse Scallop Edge

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A reverse scallop edge is a lovely traditional finish. Here the technique was used to finish a small (15")  table topper. These scallops could also be adapted as a garment hem finish. The topper is not quilted and uses no batting so that a vase can be placed firmly at its center.  Here's how it was done:
Finish interior of design as you wish. (Here we machine appliqued a traditional '30's Pansy design from Sara Nephew's My Mother's Quilts: Designs from the Thirties.)
Test scallop or edging stitch. Be sure to choose a satiny filled-in stitch. Sew along 2 layers of fabric with a layer of tear-away stabilizer underneath. Stitch for about 6 repeats.
Measure the length of one stitch. Divide this measure into your desired side length(s). --You may adjust the size of your piece to make it easily divisible by the length of your stitch.
For example, this large scallop, done on the 9mm width Bernina Artista 180, is 1 and 1/4" in length. 10 scallops equals 12 1/2 inches.
Cut a second square or rectangle of fabric the same size as the top. Pin wrong side to right side with edging fabric on top.
Mark the square/rectangle on the top fabric. (In this example a 12.5" square was traced on the blue fabric.) Make  small marks where each stitch should begin all along all 4 sides. (This will allow you to make sure the scallops sew square and start and stop where they should.)
Pin marked fabric smoothly to bottom fabric.
Start stitching at one corner of your marked square. (Note, that since your needle is starting along the  marked line, the left edge of your presser foot will run slightly  inside the square.)
Stitching at a slow to moderate speed, create scallops down each side with the scallop point hitting your measured marks. If you are getting off, adjust fabric immediately. Hold back a little to shorten the stitch; push fabric forward to lengthen. If your measurement is noticably wrong you may be able to fix it by slightly changing the length of the stitch.
At the next corner stop at the end of the scallop with your needle in the fabric. Turn 90 degrees. Continue stitching around the piece.
After you have completed stitching, lock off your threads. Using a small sharp scissors (Gingher bent handle applique scissors are great!) trim away top fabric from the inside of your scallop square/rectangle. Trim as close to stitching as possible.
Cut a 3rd square/rectangle to match scalloped piece. The final size of your piece will depend on how wide a border your have allowed for.  We allowed for a blue scallop edge of about 1 1/2" wide. Sew right sides together using a 1/4" or 1/2" seam around all 4 edges leaving a large opening for turning. (Tip: take one or two diagonal stitches as you turn each corner.) Trim corner seam allowances.
Turn right side out. Press in unsewn seam allowance.
Edge stitch around entire piece. You're done.

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