Connecting bias tape strips, particularly joining the ends to form a continuous loop for finishing edges, is a fundamental sewing technique best achieved with a diagonal seam. This method creates a less bulky, stronger join compared to a straight seam, resulting in a smooth finish on your project.
The Diagonal Joining Method
Joining bias tape strips diagonally is the preferred technique because it distributes the bulk of the seam allowance over a longer area. This makes the join lie flatter and is less noticeable than a straight seam. When the bias tape is applied to a curved edge like a neckline or armhole, the diagonal seam also has a bit more stretch and flexibility, integrating seamlessly with the bias stretch of the tape itself.
Steps for a Beautiful Join
Achieving a neat diagonal join requires careful alignment and stitching. Based on effective techniques, the process involves overlapping the ends and stitching diagonally across them.
Here's a breakdown of the steps:
- Overlap the Ends: Take the two ends of the bias tape you want to join. Place one end on top of the other, forming an L-shape or a slight diagonal overlap. Ensure the tapes are right sides together if you are joining them before unfolding.
- Align and Mark: Position the overlapped ends so they form a right angle, or align them according to how the diagonal seam will run. Mark a diagonal line across the overlap from the point where the edge of the top strip meets the edge of the bottom strip on one side, to the point where the edge of the top strip meets the edge of the bottom strip on the opposite side. This line will define your stitching path.
- Stitch Diagonally: Sew precisely along the marked diagonal line. As highlighted in one effective method, stitch "diagonally making sure to meet your initial Stitch line." This means aligning your diagonal stitch so that it starts and ends at the point where the original bias tape fold lines (or the intended seam line when attaching the tape to your project) intersect the diagonal line. This careful alignment ensures the join lies flat and integrates perfectly when the bias tape is applied, leading to bias tape that "is joined beautifully".
- Trim Excess: After stitching, trim away the excess fabric from the seam allowance, leaving a small amount (e.g., 1/4 inch or 6mm).
- Press the Seam: Open up the joined bias tape and press the diagonal seam allowance open. This further reduces bulk.
- Refold and Apply: Fold the bias tape back into its original configuration (single fold or double fold) along the pressed creases. The join is now complete and ready to be attached to your project.
Applications
This diagonal joining method is ideal for creating continuous loops of bias tape used for finishing raw edges, particularly on curves. Common applications include:
- Necklines
- Armholes
- Drawstring casings that wrap around
Using this technique ensures that the joined bias tape lies flat and smooth against the fabric, providing a professional and durable finish, such as on "all my upcoming necklines."
