Quilting cotton shrinks unevenly, destroying precut fabric bundles

Quilters buy precut fabric bundles -- jelly rolls (2.5-inch strips), charm packs (5-inch squares), layer cakes (10-inch squares) -- because they save time and coordinate colors. But these precuts cannot be prewashed without disaster: 2.5-inch jelly roll strips shrink to approximately 2 inches and fray so badly they become unusable, and washing causes strips to tangle into knotted balls in the machine. If quilters skip prewashing, different fabrics within the same bundle shrink at different rates (2-6% depending on quality) when the finished quilt is first laundered, causing puckering, distortion, and seam stress. This matters because a queen-size quilt represents 40-80 hours of labor and $150-400 in materials, and uneven shrinkage can visibly warp the final product after a single wash. The problem persists because fabric manufacturers do not standardize shrinkage rates across prints in a collection, and the precut format makes the standard remedy (prewashing) physically impossible without destroying the precise cuts.