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Use of hydrogen peroxide.
Apply a large amount of hydrogen peroxide (40 volumes) to the finished plastic area using a brush or cloth. Make sure you distribute the product evenly over the entire surface.
3. 3. Put a plastic film on top
After applying the peroxide, cover the area with a plastic film. This allows the peroxide to keep in contact with the plastic and prevents it from evaporating too quickly.
4. Being in the sun
Put the device in the sun, if you can. Sunlight allows hydrogen peroxide to act more effectively, making teeth whiter faster. Leave the object in the sun for about an hour.
Remove the plastic film and clean.
After one hour, remove the plastic film and clean any excess peroxide with a damp cloth. Continue the same procedure if necessary until you get the desired result.
Other advice
Repeat: if yellowing is important, you may need to repeat the procedure several times.
First try hydrogen peroxide on a small area to make sure it does not cause negative reactions before using it over the entire surface.
Continued on the next page
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