I understand the foam core or snagging the cardboard from Joann's ( I do that for macrame) but what is "ruler fold" Right now I have the majority of my fabrics folded and stored in bins. We had to rebuild the room where I sew due to hurricane roof/water damage last summer. I did really well sorting until it came down to "I'm tired of this" attitude and just said "oh this is close" to blue/pink/reds whatever. Since all the fabrics are stacked, it's really hard to see what's in the bin. Perhaps if I took it out and refolded it around something and put it back in rows?? Thanks for any info. Retta