Quilting Upside Down
Along with collecting beautiful fabrics, many of us have stockpiled gorgeous threads that are too thick to thread through a sewing machine needle or too fragile to withstand the machine's tension disks and thread guides. Take heart! Presented here are ways to use your beautiful threads.
Bobbin drawing is a technique of machine sewing from the back (upsidedown) so bobbin threads show on the front of the piece. Although an unlayered quilt top can be embellished using this method, we will focus here on bobbin drawing as a technique for quilting.
Because threads move through the bobbin more slowly than on the machine top and are subjected to less stress, you can use threads in the bobbin that will not work in the machine top. Bobbin drawing broadens the range of threads you can use on your quilts.
Another benefit to quilting "upside down" is that you can avoid marking the quilt top. This is helpful for delicate fabrics and prints that are too dark or too busy for markings to show clearly on the top. You can mark motifs on a backing that has little or no print, quilt upside down following printed motifs in the backing or quilt free motion without marking at all. Remember that asymmetrical designs will be reversed on the top.
Threads for bobbin drawing must be smooth enough to feed through the bobbin tension without snagging and they should be uniform in thickness. Extremely loopy or nubby threads are not appropriate for this technique.
Most regular construction sewing is done with 50-weight thread. If you wish, you can use regular thread for bobbin quilting without having to adjust the tension of either the top or bobbin thread.
A tiny dot of top thread will show with each stitch, so choose this thread in the color you prefer for the look you want to create. The color can blend or contrast with the bobbin thread. Also choose a needle that is compatible with the top thread. For regular thread, use an 80/12 needle. A thinner thread needs a needle with a more slender shaft; thicker threads and specialty threads often require a special needle with a large eye and a deep groove (or scarf) to keep the thread from fraying.
Winding the Bobbin & Adjusting Tension
Wind heavy thread on the bobbin either by hand or by machine. When winding by machine, wind without threading through any tension discs; give the thread a little tension by pinching it slightly as you slowly fill the bobbin.
Place the wound bobbin in its case as usual.
For threads thicker than regular-weight sewing threads, you'll need to loosen the tension in the bobbin case. Consider buying a second bobbin case just for this technique.
For removable bobbin cases, turn the spring screw in quarter turns to the left (counterclockwise) to loosen. Do this over a container to catch the tiny screw that may fall out if you loosen it too much. Loosen the tension until the thread pulls easily from the bobbin case. The type of stitch you use, as well as the weight of thread in the bobbin, will dictate how loose the tension should be.
If you have a drop-in bobbin case, consult your owner's manual for help with loosening its tension.
Generally, use long stitches when using decorative threads; some threads are too coarse for close stitches and many threads look prettiest in long stitches. For machine-guided stitches, adjust the machine's stitch length and keep the feed dogs up. If you want to use programmed stitches, keep in mind you'll be more successful with stitch sequences that do not overlap and create bulk. To lengthen free-motion stitches, use a slower speed on your machine and/or move the quilt faster; feed dogs are lowered for free-motion quilting.
Experiment with stitches on a sample quilt sandwich and fine tune any bobbin tension adjustments. You may also need to adjust the tension for the top thread.
Since you will be quilting upside down, you'll need to layer the parts of your quilt in the order opposite to a traditional sandwich. Slightly stretch the quilt top right side down and pin or tape in place. Center and smooth the batting and the backing right side up. Baste the layers together.
With the right side of your quilt sandwich facing down, take one stitch and bring the needle up. Gently tug the top thread to bring the bobbin thread to the surface, pulling out a 6" tail of both top and bobbin threads. Quilt as you like. When you reach the end of a line of stitching, cut the threads, leaving a 6" tail. Secure the thread tails by threading them into a large-eyed needle, tying a knot and burying the knot and tails in the batting.
Have fun experimenting with threads and stitches to give your quilts a beautiful new look.