What Is An Invisible Zipper Application
An invisible zipper application is a simple yet unique closure technique resulting in garment closure that completely blends into the seam, with the zipper remaining invisible from the face side of the seam. The only visible compartment is the zipper's slider tab which is designed to be quite narrow and dainty so that it blends gently into the seamline. Conventionally, the zipper color should match the garment's color as closely as possible, which allows the zipper tab to further disappear agains the seam housing the closure.
Invisible zipper applications can only be achieved using invisible zippers. The plastic coils are folded inwards and hidden on the wrong side of the zipper, such taht only the tab and abutting tape edges are visible form the zipper's right side. This is accomplished by folding each portion of the zipper coils inward creating a crease between the coils and the tape which is used a stitching guide.
When attaching an invisible zipper, the stitch is applied from the wrong side of the zipper, in the crease created by the folded zipper coils. To apply the machine stitch directly in this crease, the coils should be lifted up during the machine stitching process- this is accomplished by either using a regular zipper foot (as shown above) that can stitch right next to the raised plastic coils, or a specialized invisible zipper foot that feeds the coils through a narrow slot to keep them evenly raised during the stitching process.