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Re: [TCML] Secondary and Primary Assistance

In a message dated 3/20/08 10:11:53 P.M. Eastern Standard Time,  
huil888@xxxxxxxxxxxx writes:

>Just out of curiosity, is this known to be true (i.e. you've  measured the 

>conductivity of the ink printed on the form with a megohmmeter or  something 

>similar), or is it an assumption?

    FWIW, the black pigment used for flexographic  printing on cardboard 
products is carbon. Our ink supplier told us they actually  make their own, by 
burning fuel in a reducing atmosphere, and scraping the  resulting soot off the 
inside of multiple chimneys. Black ink is the nastiest  color to get on you, I 
can tell you that!
    In a pinch, or to conserve ink that would otherwise  be thrown away, we 
blend "junk" inks of various colors together to make black,  but it's a pretty 
weak black we only use for low-quality jobs.
   And FWIW I also used to work for the company that  makes those cardboard 
tubes .Although I wasn't involved with those particular  cardboard tubes, I'd 
guess the technology involves a thin layer of white  glue holding the layers of 
paper together that forms the cardboard. And the  residual moisture content 
of the paper is probably pretty high. But I would  agree that the black ink 
would be the worst problem!
    Should be easy to check with an insulation tester,  even a crude setup.
-Phil LaBudde

Center for the Advanced Study of Ballistic  Improbabilities

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