The hairline seam can be used for collars, cuffs and facings. This seam is stitched with a narrow zig-zag stitch, then trimmed close to the stitching.
When joining two bias edges, first tack the two edges together, then stitch without stretching the fabric. Use a shorter stitch then usual, thus reducing the risk of stitches breaking during wear.
A lengthwise seam must be tacked and hanged overnight so that it can stretch, before sewing the seams.
Bias edge to straight edge:
When joining a bias edge to a straight edge, take care not to stretch the edge that is bias, as the seam will not lie smooth. It will ripple.
Pin the bias edge to the straight edge, placing pins perpendicular to the seamline, approximately 6cm apart. Stitch the seam with the bias edge on top and remove the pins as you stitch.
Double stitched seam:
Double stitched seams are a good choice for textured, sheer fabric such as heavy lace. Trim seam allowances close to the stitching. Press the seam to one side.
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