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What's the difference between 3D printing and molds to produce products

Traditional molding techniques, such as injection molding, generally require that a mold be constructed in order to make a product. And the shape of the product can not be too complex, but the surface quality of the items produced are usually better. It is very suitable for mass production.

But 3D printing technology does not require a mold. All this technology needs is a file, a digital model. Then you can just print the product. Unlike traditional technology, you can print very personalized objects with 3D printing technology, but the surface quality is not uniformly that good. It is more suitable for prototyping and small batch production.