If the paper is core, how can I draw out the layer of hard paper in the middle?
Press the roll of paper hard, and try to press the ellipse a little bit (ie approximately the ellipse), then you can easily draw out the hard paper,If the roll out of shape, it can be a flag.It worked pretty well.
If it is difficult to maintain, in rolls of paper flat state, the right hand index finger were placed on both ends of the paper core, pinch it, then slowly two index to reach, while extending side pressure, until the two index finger touching, a paper core is forced out the crease, then the index finger is placed inside without moving the fingers toward the crease direction with the beat, until the paper core folded along the fold, and then taking the index finger, you can easily pull the paper core.
Put your hands on both sides of the roll, squeeze it into the center, roll the paper, and try the hard core.