Quick tip regarding the use of cardboard to separate fabrics... don't use actual, uncovered cardboard. Pulp paper is very acidic, and can discolor your fabrics, especially stash fabrics that may stay on the shelf for awhile. (It doesn't matter if the cardboard is white... that just means it's been bleached.) The idea is still sound, though. Just either cover the cardboard with laminate, or go to a frame or art shop and get archival mat board scraps to do your dividing. Museum quality mat board is made of cotton, and won't leach acids into your fabric.