How can I dry up the rose petals that are drying up?

I want to keep the rose, or the rose petals at least, and it is dying, so I need to preserve the petals! CAn anyone tell me what I can do to make the petals look nice when dried? Or perhaps how to make it into bookmarks?

How can I dry up the rose petals that are drying up?
I hang my roses upside down over heat and spray them down with hair spray and this works nicely.
Reply:my mom always finds away to hang the roses upside down by their stems. but i dont know how to do the petals