Bulve.zip Guide

: Pulling or stretching the fabric while sewing the zipper in can cause it to "wave" once released.

: 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. bulve.zip

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) : Pulling or stretching the fabric while sewing