3D PRINTINGIntroduction3D printing is a process of producing three-dimensional objects from a specific digital file, which is why 3D printing is often referred to as additive manufacturing. 3D printing takes raw materials from biodegradable plastic to nylon, then melts it into very thin layers on a surface and then moves on and prints another layer until the prints are finished. This is checked by a skilled person using CAD (Computer Aided Design) software. In the old days producing a prototype required a mold, otherwise when using a 3D printer it was possible to produce a prototype without using a mold. This reduces the time to create and produce a prototype from weeks to days. How it works There are currently numerous 3D printers and each type of printer uses different materials and mechanisms, but they all have the same basic technique which consists of printing objects. 3D printers print on objects by spraying or transferring multiple layers of a material onto a build platform, starting with the bottom layer. When printing a 3D object, the end user of the 3D printer must first produce a 3D image of the final product they wish to print using an application software called computer-aided design. The CAD software program sends the object desired by the end user over hundreds or thousands of horizontal layers. All layers are then placed on top of each other one by one until the entire 3D object is developed. 3D Technologies3D printers do not use the same technology to create objects, which is why there are different ways of 3D printing technologies. 3D printing methods include melting or softening the material to produce the layers. Types 3D printing technologies Selective laser interring (...... paper half...... other private goods. • Counterfeiting: the biggest possible disadvantage of 3D printing is counterfeiting or production of "fake" material and the resulting problem of copyright infringement. This technology turns anyone who owns a 3D printer and comes into possession of it into a manufacturer. Therefore, it would be very difficult to trace the source model of fake objects and copyright holders would have difficulty protecting their rights • Size limitations: Currently, 3D printers have limitations in terms of the size of the objects created. However, in the near future, we will have printers that can do this print architectural structures. • Raw material limitations: Currently, 3D printing is only feasible for items made from a single raw material. However, the technology to create objects using more than one material is being developed and will soon become a reality.