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The first time I made a double-busk for a corset, I was absolutely stunned by the difference in the strength and stability of the busk. A double-busk (also called a backing bone) is quite simply an extra 1/2" or wider spring steel flat, placed directly behind the busk opening. It serves not only to visually prevent undergarments or skin from peeking through the busk, but greatly strengthens the busk and helps to prevent the busk from popping open if the wearer is physically active, particularly with curvier figures.

The images shown here are for a coutil-only corset (the black fabric), and for a covered corset (the blue silk).  I planned for the inclusion of double-busks in these corsets, but this is a feature that can easily be added to most corsets after construction is complete.

Choose a bone that is slightly smaller than the busk. In these cases, I used bones that were 1" shorter, but I have also used a 3" shorter bone in the past.





Cut a rectangle of fabric that is wide enough for a bone channel, seam allowance, and enough extra fabric that it can be sewn to the corset. Vertically, it needs to be long enough for the bone, plus seam allowance fold-under. In this case, I made the fabric 4" wide and only 1" longer than the bone. I should have made it 2" longer than the bone.





If you are making the double-busk for a covered corset, cut an identically sized rectangle out of your cover fabric. Also keep in mind that the structural layer does not need to be coutil, because the double-busk does not receive any stress from lacing. In this case I used cotton duck canvas, because it has structure but is far less expensive.





Fold the rectangle in half width-wise and sew seam allowance along the side and top. If you are including cover material, fold it inside, with the wrong side facing the structural fabric. When sewing the seam, you can also include a string sewn into the upper corner to help when turning the fabric later.





Trim the corner to eliminate bulk when turning.







Press open the seam, so it will be easier to cleanly turn the fabric.





Use a pencil or other small object to press the sewn end into the tube of fabric and turn it.







Force the seams to crease nicely. I have found that using the bone to press out the fabric is helpful. If you sewed a string into your seam, use it to pull the corner out and then trim it off. It may take some coaxing to get the corner cleanly out. Iron if needed.







Sew the boning channel to the side opposite the long seam. If you are planning to turn in the open edge, stop at the length of the bone. Also edge stitch along top of the panel, to help re-enforce the bone placement.

Insert the bone and secure it in place. Trim the bottom edge to about 1" and then turn it in. Edge stitch along all seams to secure them and ensure they will stay flat.

If you do not have enough extra fabric at the bottom to turn in, or do not want to turn in the edge, then sew at the bottom of the bone to secure it in place and trim to edging distance. Then finish it off with an edge binding like the final corset will have.

Position the double-busk so it will center on the busk opening, and stitch it in place. BE CERTAIN to place it on the peg side of the busk. If you place it on the hook side, you will have a very hard time closing your busk.

My stitches followed the stitches for the busk. If desired, you can sew a second row of stitches just away from the busk seam. If you do that, I recommend mirroring the stitch line on the other side of the busk for visual consistency.





Front and back views of the two-layer double-busk, after the corset was finished.  Due to the contrast stitching, I used a thread that matched the cover material and stitched just toward the busk from the contrast stitching.  The two stitch lines run right next to each other.







Thank you for reading, and I hope you find this tutorial useful.

 

 

Sidney Eileen is the official corsetter for Bustledress.com.  For more information on my custom corsets, please see me there or visit my web site at sidneyeileen.com/corsetry.htm.

 

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