Reporters learned that the current 3D printing supplies raw materials are divided into nylon, powder, pla plastic and metal four, of which the lowest cost pla plastic, metal expensive. A hand skeleton model is widely used in the medical field for example, printing costs about 100 yuan pla plastic, nylon and powder costs about 2,000 yuan, while the cost of supplies of the metal up to a million, or print one hand bones Most models also need 8-10 hours, often printing company will print products to these higher costs twice the price sold to customers.