Product visibility is the main objective of UID marking for which the Department of Defense (DoD) has approved specific criteria for unique identification codes. Each UID label should bear a universally recognizable and specific code. According to DoD rules, unique identification data should follow recommended technical logistics.

MIL STD 130 is the recommended criteria for DoD unique identification marking. This standard focuses on the marking method, data format usage, marking material choice, and information required on labels. MIL STD 130 strictly recommends contractors use the 2D data matrix coding format. This high density bar coding format is scanned by an automated data reader. According to these specifications, an efficient bar code reader checks label data and content to ensure quality, as well as uniqueness. This process is called data validation. Data validation is the pre-stage of data verification. A vision verification device authenticates the code profile. The data must contain information like the part number or serial number of the product, enterprise code, manufacturer’s license number, and more. These standards have also prescribed a number of criterions that will guide the UID marking process.

According to the specified standard of DoD, metal nameplates and tags can be used. The code can also be directly marked on the surface of a product. Small items that do not have space for nameplates or direct marking can include approved tags. These tags and metal nameplates should undergo environment and clinical tests as recommended by DoD.

Apart from metal stamping and engraving, MIL STD 130 specifies the usage of other marking methods. These methods include programmable stylus markers, laser marking, inkjet printing, electro chemical etch, and embossing, among other methods. Metal or plastic tags are recommended when other tag-types are unavailable. Laser marking offers an approved resolution for MRI and alpha numeric marking. As for laser marking, the approved range of character height and width is 0.007 to 4.0 inches.

Wide area work flow is a DoD approved data capturing methodology. According to MIL STD 130, each of the suppliers, manufacturers or contractors have to bear DoD registration codes. This specific code will be delivered at the time of invoicing. The code must represent details of the product, including item type, its original owner and the actual value. The data capturing technology transmits this data directly and keeps them recorded in special scanners. http://www.uid2go.com/examples.html provides helpful information regarding the approved unique identification process.

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