Conductivity of cheap 'soldering paste (flux)' in extremely high impedance circuit board (?)

[Willen]

Hi,
Some said that almost any flexible thing (like rubber, wood, wire insulator plastic etc) might be a conductor in extremely high impedance matter.

I made some basic circuit like 3 transistors static/active line detector in darlington mood or jFET circuits to detect static charges etc. I assembled the circuit it board (a cheap board which has already holes) but got always ON output. Then I assembled the circuit without board (lead to lead connection) then it started to work. I guess the board is not conductive but I am suspecting to my cheap soldering paste (flux). Is it conductive in such extremely high impedance circuitry? I hope some have good chemistry knowledge.

 

[KeepItSimpleStupid]

You don;t know the troubles you have to go though with high Z stuff. Phenolic at 10-11 ohm-cm is pretty crappy. See **broken link removed**.

Hey I could measure the conductivity of a piece of paper at work. A film of Acetone on glass is conductive.

It's probably the board material. You might be better off with FR-4 and Teflon/PTFE standoffs when required. Guarding is also important.
The flux will be conductive too if not removed. So will, believe it or not, fingerprints.