Paper/cardboard (unplasticised) is made from cellulose which is 
hygroscopic. The absorbed humidity is sufficient to prevent static 
charges from forming under all normal conditions; in fact, you would 
have to work really hard to give it a charge even in low relative 
humidity conditions. When I was a kid, we cut strips of kraft paper, 
about 8 cm wide, held them in front of an electric radiant heater for 
about 10 minutes (I guess they reached about 100°C), rubbed them like 
hell on a trouser leg, and made some tissue paper figurines dance up to 
them. The effect lasted no longer than five minutes without re-heating 
the paper to dry it out again.

Brian

On 28/06/2011 22:15, Juan T. Marugán wrote:
> Hello all.
>
> There are some cardboard boxes (brown color) with the ESD symbol printed in the outer surface. I suppose the symbol only indicates that there is an ESD product inside, but I’m not sure. Am I right?
>
> Reason of my confusion: I’ve measured the surface resistance in these boxes and is 1x10E10 ohms: Static dissipative?...
>
> My concern is because de presence of these materials in the workshop. Mechanical parts, for example, are packaged in cardboard boxes and it is a hard work to re-package them into conductive boxes (plastic or cardboard) before to use them in the line.
>
> If somebody can give some idea, I’d appreciate it.
>
> Thank you so much.
>
> Juan
> Indra Sistemas. Spain.
>
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