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This paper describes two ceramic-forming technologies based on 3-D printing. One technology forms the product with 3-D printing indirectly, while the other technology forms the product directly with 3-D printing. The whole 3-D printing technique, including computer-aided design, 3-D printing of a model with plastic filament, molding with plaster, and slip-casting, was shown to produce a pineapple cup. Compared with the traditional ceramic-forming technology, the new method is more efficient, and articles can be precisely made especially for mass production of complicated designs.