It works by creating parallel "rungs" of thread across the opening, which, when pulled taut, disappear. How to Sew an Invisible Secret Seam
Every few stitches, pull the thread taut. This action causes the folds to join and the stitches to become hidden. Secret Seam
Iron or press the raw edges of the opening inward by approximately It works by creating parallel "rungs" of thread
For high-strain areas like pillow seams, use a double strand of thread for extra strength, suggests the Applegreen Cottage Tutorial . Alternatives How to Hand Sew an Invisible Stitch (Tutorial) when pulled taut