Please check some of the other threads on the subject of using cardboard,cereal boxes, etc to store fabric on or in. I believe you'll find alot of people have discouraged their use because of the strong possibility of the acid in the paper. They use corrigated plastic (available at sign shops or the comic book acid-free boards). When I started to do my fabric on the corrigated plastic, I just bought as I could afford. So it's an ongoing project but well worth it to know that my fabric will not discolor.Until then my fabric is folded using a 6"x24" ruler.
Something else you might want to keep in mind is trying to avoid storing your fabric where direct sunlight might hit it so as to avoid sunlight fading. I've had both these problems in the past-fading from sunlight & acidic cardboard which was the bolts the fabric came on that I didn't remove right away.
Experience is the best(or worse) teacher.