This is perhaps the easiest step because all you need to do is pour the paper pulp into the watertight basin, and then add several gallons of water. It doesn't matter if it is warm or cold water this time. The added water will help make your paper flatter and thinner. But be warned, because if you put too much water your paper may: be very thin, have holes, and/or hard to dry. Then give the mix a quick stir.