All items of hand-made paper, like fingerprints, are unique.
The unique distribution of chain lines, laid lines, flecks, specks and watermarks can be recorded by back lighting, thus providing the equivalent of a digital fingerprint.
To deter thefts, and to aid recovery of stolen items, the back lit image is archived with a front lit image – this is the PaperPrint.
Read Abstract of Royal Horticultural Society Report
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