engleski

Investigation of Document and Security Digital Printing Procedures

Investigations are issued on printing documents and security papers in offset using pastel spot colours combined with digital printing using process colours. Prints produced by several printing techniques are compared with forgeries made by todays most popular counterfeit techniques. General moire deduction is given for two different raster ruling. Suggestion to combined printing procedures of security programme are given, as well as recommendations to future investigations.

security colours; simultaneous digital printing; moire

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