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[0] Coutil Tubing – Internal and External boning channels [2] You can’t see the contour of the bones from the outside of the corset. The bone is encased between at least three layers of coutil making for a long term and secure fitting for the boning. Can be cheaper than twill tape. Neat and professional finish on the inside of the corset compared with twill tape, making it a great choice for single layer corsets. [3] As for twill tape, it can be a pain lining up your boning channel on the inside of the corset. It takes longer to make the tubes than it does to use something “off the roll”. Again, like twill tape it can be a little bulky. It takes time to tacking stitch the tube into position ready for stitching. [1] 
Create a tube out of coutil and stitch to the inside of the corset to create boning channels. For external boning channels, you can add a layer of fashion fabric when making the tube to match/contrast with your fashion fabric layer.
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