Originally Posted by
AliKat
Actually that is how I make sure my fabric is on grain before I do any cutting. You'd be surprised how many times the fold line from the bolt isn't on the straight of grain.
That is why I prewash my fabric. After washing and drying I hold the fabric up by the selvage edges and keep adjusting those edges to the right or left until the fabric is straight on the bottom. Then I press it.