PETG+ material is a type of printing string, technically called filament, which is used in 3D printers working on the principle of FDM, i.e. the gradual deposition of molten material. The base material is the common PETG, which stands for Polyethylene Terephthalate Glycol, a plastic known for its good strength, chemical resistance and relative ease of printing. The "+" in the name indicates that it is a modified version of this base material. Manufacturers add special additives, known as additives, to improve certain properties. Most commonly, these include increasing mechanical resistance, such as impact strength, which is the material's ability to withstand impact without cracking, and the overall strength of the print. Sometimes this modification can also lead to easier printing, for example by reducing the typical 'thread pull' between parts of the model, or to achieve a specific surface, such as a matt finish. PETG+ is therefore designed for printing functional parts where a higher resistance to mechanical stress is required than that provided by the standard PETG version.