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Tag: Letterpress
Optimizing Serialization: Part 4
The first three articles in this series reviewed contemporary security document serial number design strategies related to letterpress printing technology, security inks and font...
Optimizing Serialization: Part 3
The first part of this series discussed letterpress numbering machines, detection of counterfeit serial numbers by printing process examination, and strategies for optimizing letterpress...
Optimizing Serialization: Part 2
The first part of this series discussed microscopic characteristics of serial numbers applied by letterpress numbering machines, detection of counterfeit serial numbers by printing...
Optimizing Serialization: Part 1
Despite the introduction of promising new digital security serialization technologies, letterpress numbering machines are still used to serialize most paper documents today. A letterpress...
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