Part of the Police‚s document examination section, Walsh travelled to drupa to conduct research for the third update to the police‚s printing processes manual.
The manual, which is produced by the New Zealand Police, details every known printing process in existence and is used by document laboratories around the world.
Current holders of the manual include the New York State Police and FBI in the
United States, along with Swedish and Canadian forensic laboratories, amongst others.
Walsh and her colleagues spend hours studying printed matter under the microscope, developing their understanding of the differences in appearance.
Walsh’s drupa research visit marked a significant step up in the production of the manual. Until this year, the print samples for the manual had come from the generosity of printers around New Zealand.
Of particular interest for the third update to the manual is the process of magnetography. This will be the first time the process has featured.
The printing processes manual was first released six years ago and has been updated twice since then.
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