Graphite pencils from an art store such as Aaron Brothers work well as to do many other soft pencils. The best bet is just to buy a bunch of different pencils and test them out. Graphite pencils are often better than regular pencils because the regular pencils use other non-conductive fillers (clay) in them.
Larry Woolf
-----Original Message-----
From: Phys-l [mailto:phys-l-bounces@www.phys-l.org] On Behalf Of Lulai, Paul
Sent: Friday, March 04, 2016 1:23 PM
To: Phys-L@phys-l.org
Subject: --EXTERNAL--[Phys-L] Graphite resistivity
Hello.
I am getting ready to do a resistivity lab that I've done for a decade but I ran into a problem. The art pencils that I've been using are gone. They apparently vaporized along with my packet of materials from an old aapt workshop a decade or more ago.
I remember that art pencils were better because...
I don't remember...
I am tempted to pick up softer leaded pencils so the lead would get into the cracks of the paper.
Does anyone have a quick recommendation?
Thanks for your help.
Paul.
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