21. Working chemically, a bleaching agent is used to carry out an oxidation reaction in the enamel and dentin. 22. The trays often don't fit and a patient ends up eating a lot of the bleaching agent , Goldstein said. 23. In the dentist's office, argon lasers are sometimes used to activate the bleaching agents and speed up the process. 24. 1900-Fuller's Earth Plant mined clay to be used as bleaching agent and as an absorbent for oil and fat. 25. Sodium borohydride is used as a bleaching agent for wood pulp, and blowing agent for plastics, among other uses. 26. They added that the substance, an antiseptic and bleaching agent , should generally be harmless if it was sufficiently diluted. 27. Chlorine dioxide is widely used as a bleaching agent in paper mills and as a treatment in water treatment plants. 28. A chemical solution is applied to the teeth and a special light may be used to help activate the bleaching agent . 29. The only remedy in this case is to remove the finish down to bare wood and try a commercial bleaching agent . 30. A toothpaste that promises to whiten teeth with a bleaching agent can do little to change the color of teeth, dentists say.
