Any pen and paper will do. If you burn too much, you can recite the Buddha's name and turn it into clean running water.
Master Yin Guang taught us to use a clean pot and put a clean foil ingot under the pot to prevent paper scraps from splashing. Then, we collected the dust, put it in a new cloth bag, and added clean sand, clean stones, clean bricks and so on. , and then sink to the bottom. Sand and gravel are added to prevent paper scraps from floating on the water and being polluted. Excerpted from Yin Guang's Manuscripts.