This is a graphite (maybe
but it may not be!) coated paper with a resistance of between 2000 and 3000 ohms per
square metre.
If it is carbon then carbon has a resistivity of about 3.5x10-5
ohm metres. This means that a one metre cube of carbon would have a resistance of
3.5x10-5 ohms.
Now our paper has a resistance of say 2500 W per metre square and so we can make a guess at the
thickness.
Using the equation:
Resistivity = [resistance x cross sectional area]/length = [resistance x thickness x width]/length
We will put length = 1 m, width = 1 m
and resistivity = 3.5x10-5 ohm metres
This means that we get for the
thickness:
Thickness = 3.5x10-5/2500 = 1.4x10-8 m =
1.4x10-5 mm.
Seems rather small to me. Maybe the coating is not pure
graphite at all. (It isn't).
Apparently the paper is coated with a graphite-based
material and the suppliers will not reveal what the material is. I reckon it must have a
higher resistivity than carbon and this makes it a thicker
covering.