In art studies iconography is the description and systematiza-tion of typological conventions and schemes used in the representation of either persons (real or legendary) or narrative scenes.
Whitening Your Teeth with Hydrogen Peroxide. 1  1. Use hydrogen peroxide. 2  2. Purchase a bottle of hydrogen peroxide from your local drugstore. 3  3. Use a mixture of the hydrogen peroxide and water as a mouthwash.  4. Brush your teeth with a hydrogen peroxide and baking soda paste once a week. This mixture will help keep your teeth looking white and clean. Here's how you can make it: Pour 2 teaspoons (10ml) of hydrogen peroxide into 3 teaspoons (15ml) of baking soda. Mix these together until a paste forms.
Even brushing your teeth can knock out some of it -- brushing with the abrasive toothpaste cleans the tooth in the same sort of way scrubbing with an abrasive pad cleans a dish. Whitening toothpastes are designed to work even harder on this layer. The problem is, as this pellicle layer sits on your teeth for years and years, the foreign material gets into the enamel. The enamel layer is made up of hydroxyapatite crystals, which form microscopic hexagonal rods..