A maple leaf, newspaper, the heaviest books in the house and one week. But it is not the pressing that makes this research — it is the four lines that land at the very end.
1Pick — and say where you are standing
2Lay it flat in newspaper the same day
3Stack the heaviest books on top
4Change the paper after two or three days
5Mount it with paper strips
6Write the label: what, where, when, who