Based on your query, there appears to be a slight typo. You are likely looking for information regarding (sometimes referred to as zipper puckering) or possibly bulve , which is an older term for certain types of bulb vegetables or specialized anatomical structures. 1. Zip Bulge (Zipper Puckering)
: Shaping the center back seam of a pattern to match the body's curve rather than using a straight line. bulve.zip
: Industrial manufacturers often use a heat press to stabilize zipper length before it is sewn into high-precision garments. HOW TO REDUCE THE ZIP BULGE TUTORIAL | KIM DAVE Based on your query, there appears to be a slight typo
: Applying a strip of lightweight iron-on stabilizer or stay tape to the seam before sewing helps the fabric behave more like a woven material. Zip Bulge (Zipper Puckering) : Shaping the center
In fashion and sewing, a "zip bulge" is a common issue where a zipper does not lay flat against the body, causing an unsightly curve or bump.
: A straight zipper placed on a curved seam, such as the lower back, often creates a bulge because it doesn't follow the natural "S" curve of the spine.