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Ever since the introduction of friction brakes in vehicles, brake system designers have been striving to improve braking performance. To meet this growing demand for better brakes, lining manufacturers have evaluated numerous additives in their material formulations. These additives provide several different technical properties, the foremost being safety-related features such as frictional stability and resistance to fading. In more recent years, brake noise has become important with the elimination of asbestos fibers in linings, and there is now also a need for a higher frictional coefficient to offset increases in overall vehicle weight. Prolonging the service life of brake components, reducing pad wear, and minimizing rotor wear caused by DTV (Differential Thickness Variation) are other issues that face lining manufacturers.