I learned to do the dusting method before my teen yrs. (I'm almost 60 now) It worked using the dust powder for a plumb line. Like in the hardware store. Ok you put quilts in a long frame then for hand work and you pierced the paper pattern and marked as you went along. So down the length of the frame and quilt or each block. These chalks come in pale pink and pale blue and do wash out or rub off. I'm not sure you all would like it with today's methods.