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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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