I use the Mark b gone blue marker from Hancocks. It stays there until you wipe over it with a wet cloth. I use bridal tulle on the roll to trace patterns of quilt designs from the pattern book or after I have enlarged one I find by printing it on the printer. I use a black sharpie so it will stay on the tulle. Pin the tulle in place on your quilt and trace the design with your marking device, whatever you choose. Do not use the sharpie on your fabric just to trace from the paper pattern.