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Thread: Invisible ink or liquid - please help

  1. #1 Invisible ink or liquid - please help 
    New Member
    Join Date
    Feb 2008
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    2
    Trying to figure out a safe way to put words or (watermark) on an object using a liquid or any safe substance that is invisble to the naked eye but can be viewed through a camera or a peice of glass/plastic. Is this possible? Trying to create a homemade copyright security for a film. Thanks in advance.


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  3. #2  
    Suspended
    Join Date
    Apr 2007
    Location
    Pennsylvania
    Posts
    8,822
    Just google infrared ink or uv ink.


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