Dwight Tshudy introduces the

Use of micro-security dots on color laser printers and color laser copiers at the 2009 Forensic Science Workshop

Dwight discusses the presence of micro-security dots to help prevent forgeries

 

Mike Pugh looks carefully for the dots with a blue light and a magnifying glass

 

Checking for the dots on US currency

 

Checking for the dots on a color laser printout

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