Troughing is one of the best solutions for containing bulk product, especially for powder or product in granular form. Troughing causes products to accumulate closer to the center of the belt. While this is contrary to the even distribution of the product over the belt surface, it gives better tracking balance to the belt and eliminates the need for containment side walling, preventing spillage or product loss. The depth of the trough can be shallow or deep but the angle at which the belt sides can trough successfully is determined by mechanical factors that include belt thickness, flexibility and width.