Things You'll Need
Instructions
Dilute chlorine in water. Use a very small amount of chlorine for the water. The chlorine is used to bleach out toning in a stamp, but if too much is used it damages the stamp. Add about one capfull of chlorine for two or three cups of water. When in doubt about the amount, test the dilution on a worthless stamp before using it on a prized stamp.
Dip a cotton swab into the mixture and gently apply the chlorine and water to the stamp. Allow it to sit for no more than five minutes and then clean with plain water. Allow the stamp to air dry.
Apply peroxide to a cotton ball or swab. Since the peroxide already diluted when you buy it, it is not necessary to dilute further. Gently dab or apply to an oxidized stamp. This is used to stop the discoloration of stamp inks caused by oxidation.
Clean with water on a cotton swab and allow it to dry.