If the stitches are visible, the tension is too loose; if the fabric puckers, it is too tight.
It works by creating parallel "rungs" of thread across the opening, which, when pulled taut, disappear. How to Sew an Invisible Secret Seam
When properly executed and tightened, the thread vanishes into the fabric folds. Secret Seam
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)
Ideal for finishing items that cannot be easily turned inside out, such as plushies, pillows, and hem linings. If the stitches are visible, the tension is
Iron or press the raw edges of the opening inward by approximately
Insert the needle into the opposite fold directly across from your starting point, moving the needle through the fold for about 14one-fourth 12one-half inch before bringing it out. For high-strain areas like pillow seams, use a
Use a single or double thread that matches your fabric color. Start by pulling the needle through the inside of one folded edge to hide the initial knot, according to the StitchFloral Tutorial .