Al

Pure cotton will never insulate to that extent. Synthetic fibres and low-cotton mixes
(often sold as "cotton") may. Cotton is sufficiently hygroscopic that the IR is never
brilliant, even at 15% RH. Would you grab hold of a live 200-500 V power cable with
cotton gloves?

Brian

"Cash, Alan" wrote:

> Jim:
> Some white cotton gloves will insulate the operator from the item being
> held.
> This may cause an ESD problem. Each type of glove is differentin its
> characteristics.
>
> Al Cash
>
> -----Original Message-----
> From: James H. Moffitt [mailto:[log in to unmask]]
> Sent: Thursday, November 25, 1999 7:47 PM
> To: [log in to unmask]
> Subject: [TN] ReGlovesor FingerCots
>
> Folks: In a former life (two lives back) I worked as a process engineer in a
> plant that made process control equipment for the paper industry.  We
> die-cut
> samples to perform an ash test and identify the basic constituents of the
> paper (could sometimes tell what part of the country the trees were grown
> in).  The basis weight measurement of the die-cut sample was very precise
> and
> we used white cotton gloves to handle the samples.  In efforts to eliminate
> variation I found that the samples were being contaminated by operators who
> were wearing these nice neat looking cotton gloves.  Some experiments showed
> that the MTBF of the cotton gloves was less than two (2) minutes.  That is,
> at the end of a two minute period the gloves had absorbed so much body-based
> contamination from the wearer that they were contaminating the test
> specimens.  We went to Playtex gloves and solved the problem.  In a more
> recent previous life I worked for DOD and was never able to convince the
> DOD/Industry working group that wrote the Mil-Specs that cotton gloves
> should
> be eliminated because they contribute more contamination than they prevent.
> Finger cots work, and work well.  For best results use finger cots over
> cotton gloves as the mesh of the gloves tends to wick perspiration out from
> under the cots and increase operator comfort (also your customer will think
> you are REALLY taking care of his product).
> Regards, Jim Moffitt, Electronics Training Advantage, Indianapolis Indiana
>
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