After cold ferment, and using a kitchen scale, divide the dough ball into three equal smaller dough balls. Ideal weight is about 260 grams. While holding a ball in the palms of your hands, pull and the sides of ball with fingers and tuck into bottom of ball. Then using one hand, roll the ball with your palm on the floured surface to form a skin on the top of ball. Do this to each ball, then place in a floured container and set aside for at least 6 hours.