Salt is an essential ingredient in the manufacturing process of soap, detergent and glycerin. Khewra Salt Lamps offer finest grades of salt to attain the requirements of the soap, detergent and glycerin. After the saponification reaction, the soap is washed with concentrated brine solution(NaCl) to separate glycerin. The solubility of soap increases in water leading to the softness and mushiness of the soap. Hence salt is used to reduce solubility and due to this reduced solubility soap leaves the solution forming a solid mass.