Growing needs for identification of small items for tracking and traceability purposes have led to the development of encoding structures known as matrix codes, capable of containing machine‐readable data. Describes practical applications for two particular types of high‐density code, the Data Matrix code and the DMT code. The applications relate to needs within the electronics industry, the automotive industry, and the aerospace industry. Through these examples an approach is presented for selecting appropriate codes and marking methods for given applications. The two codes considered, although both high‐density structures, exhibit different features. These are examined as a basis for considering their suitability for the various applications. Later in the paper the codes are discussed, along with the methods of printing and/or realising them in direct‐marking form.
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