Hem Lace and Curling Up--The Cure? Unabridged Dictionary

I have learned more about using hem lace. Yes, it does make the piece curl up. I have a lot of trouble with motif #3, the butterfly piece, for example. But I learned on two subsequent pieces (that I will post about in a moment), that I can put them under an unabridged dictionary overnight (with wax paper covering the pieces) when the hem lace is almost dry and they will flatten and stay that way. Pieces that I have tried to flatten later in the process don't work as well.