How does it happen? It begins with the laying out of the backing when preparing the sandwich. The backing is laid down first and must be secured snuggly. Not too loose. Not too tight. Just right. If you work on a carpet you can pin the edges down. I work on my uncovered ironing board, on plywood. I tape the edges with blue painter's tape. It works like a charm...mostly.
I don't know how I blew it this time, but fortunately it was a very tiny pleat about 1 mm deep. It was the result of a little too much backing fabric in that area. When I stitched in the ditch it got doubled over and pulled some other bias-wise wrinkles in as well although they didn't pleat. I was lucky it happened along the straight line of a border strip. I hadn't done any fancy quilting there yet.
My fix required un-stitching about 3-4 inches along two seams, tying off the threads and straightening the fabric. Then I carefully pinned the fabric in place, attached the duel feed foot, changed the thread and replaced the ditch stitching.
Specifically, I held the sandwich together, easing out the backing fabric with my fingers. Then I pinned the sandwich together from the back with 1/2 inch of pin showing on the front across the seam. They were about 3/4 inch apart.
|Pins in the back smoothed the backing|
|Pins as seen on the front of the quilt|
WARNING: Never sew over pins. You can throw your machine out of timing and cause a great deal of expensive damage as well. I could have basted with needle and thread, but I didn't. Instead I used extreme care and was using the dual feed foot. I did not attempt this with FMQ. That would have spelled disaster and would have looked a mess (at least for me).
Success! The pleat is gone although there was a fair amount of puffiness in the area that looked more like easing than anything else. The affected border was quilted with piano keys and the stitching took up a lot of fabric. It looks perfect after all is done, and I don't anticipate any more problems, but I will be watching.
|The piano keys ate up all excess fabric with no pleating|