Right, but you can't pop down to the local store and buy wood pulp (can you?). This does have the advantage of using something you can buy practically anywhere.
Hmm, in that case, the machine should generate solidified wood pulp from any paper waste. Then your source of material is much larger and cheaper - i.e. cast off cardboard boxes from the local supermarket, irregular shapes and sizes don't need to be glued together.
