I then pushed my needle through the roll of cardboard, starting at the right-hand side, going from inside the roll towards the outside (the knot of the thread therefore remains hidden inside the cardboard roll. You must sew the two ends of the cardboard roll together to fix the roll in place). Working from right to left, I stitched using a blanket stitch: in fact, you simply have to push the needle through the cardboard (through just one thickness of cardboard) at regular intervals and bring it out through the loop created by the thread (photograph on right).