Things You'll Need
Instructions
Cut out the stamp, leaving about 1/8 inch to 1/4 inch of envelope around the stamp.
Soak the stamp in a metal or glass bowl with turpentine. Check the stamp after 10 minutes. If the stamp won't come off, put it back in the turpentine and test with tweezers on the corners every five minutes until the stamp can be lifted off the envelope. If reusing the turpentine, store in a tightly closed metal or opaque glass container. Turpentine can eat through plastic, so this type of container is not recommended.
Remove the stamp from the envelope when it seems loose enough to come up. Pull the stamp slowly, but do not force it. Keep soaking in turpentine if needed.
Place the wet stamp between two pieces of blotting paper once it has been removed from the envelope. Place inside a thick book or under a smooth weight for one week. This will allow the stamp to dry flat. If a stamp is left in the open air to dry, it will curl. If this happens, wet the stamp and press.