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Textured pad

A textured substrate is a type of print surface for 3D printers that features a finer-grained or coarser surface. Typically, it is a flexible steel plate coated with a special powder coating, most often made of PEI material, a type of plastic that resists high temperatures. The main function of this backing is to ensure a good adhesion, i.e. 'tack', of the first layer of the printed model. Due to its structure, it provides the molten plastic, known as filament, with a larger surface area on which it can catch, reducing the risk of the model coming off during printing. This is particularly useful for some materials, such as PETG, which can stick too strongly to smooth surfaces and risk damaging the backing when the print is removed. The second characteristic is the final appearance of the print's underside. This is because the texture from the backing is imprinted onto the model, resulting in a uniform, matt and slightly grainy surface. This effect is often sought after for aesthetic reasons and can also hide minor imperfections in the print on the first layer. Once the print is complete and the substrate has cooled, the model can usually be easily removed by slightly bending the plate.

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