Security papers have been used in security printing. The papers include features which is used to differentiate or authorize a document as original, like watermarks or invisible fibers or features that show evidence of fraud in attempting. For example, it can be used to delete or alter printed materials such as quantities or signatures on a report. Sources of such documents are those used to classify documents such as passports and certificates. These include birth certificates and various types
printing (2)
The most common technology used in 3D food fabrication is the fused deposition manufacturing, which involves the application of material extruded from the nozzle layer-by-layer at a slightly higher temperature. Fused deposition manufacturing is also known as hot melt extrusion because a hot melt of the ingredient to be fabricated is used as the printing material. This technology is most commonly incorporated in the 3D chocolate printers.
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