Could i press a rose for a couple of weeks then put it in a glass picture frame?Will it keep?
That should be fine. Just make sure the rose is completely dry. It's moisture that grows mold and things, but as long as the flower is properly pressed and dried (like putting it in a phone book, or a flower press), then you can display it just about any way you want.
Frames For Pressed Flowers
Due to the thickness and amount of moisture in a rose, it would most likely turn Brown, get moldy and/or rot if you pressed it in a phone book. Phone book pressing is good for leaves and flowers that are more on the flat side.. For your Rose, your best bet would be to purchase Silica gel pellets (inexpensive) at a craft store and follow the directions. Silica are small crystals that will suck all of the moisture out. You just layer the silica upon the rose until it is covered completely. In a couple of days it will be preserved (dry) and ready for framing. It will also keep its shape and would be more suitable for a shadowbox frame. The silica can be saved indefinitely and can be reused too :) Good luck to you.
You know they have picture boxes because when you press one it doesn't look the way you want I have a lot of roses dried first in a dark place. so some of the color stays and when you put it up make sure the sun isn't hitting it it will fade.