Triboelectric Series 是如何 [製造]出來的?

Suppose A, B, C,etc represent objects made of different material.
First, charge A and B by rubbing A against B and test their polarity with an electroscope. Suppose A is positive and B is negative.
Then, charge A and C by rubbing A against C and test their polarity with an electroscope. Suppose A is negative and C is positive.
We can conclude the triboelectric list is: C>A>B.
Repeat B with another object D. Suppose B is positive and D is negative.
We can conclude:C>A>B>D and so on.