"John Larkin"
Somewhat along these lines John?
http://www.sumikoaudio.net/ocos/idx_products.htm
No. They show a thin inner conductor with thick insulation.
** Try reading the text.
There is no "insulation"used.
The black layer is a carbon filled plastic = a conductor.
Impedance
goes as the log of D/d, where D is the diameter of the shield and d is
the diameter of the inner conductor. So to make D/d approach 1 (and
impedance approach zero) the insulation must be as thin as possible
(which adds capacitance, of course.)
** What if there is a conductive layer used ?
The impedance graphs and text on the cited web page are made-up lies.
** You have done tests on the stuff - right ??
But I suppose the wilder the lies,
** Err - like your ones here ??
Audio doesn't really matter anyhow.
** Only to the deaf and the daft.
...... Phil