Analyser for impregnated paper

[jangolobow]

I am searching analyser (online) ifpossible, which could be used to distinguish between different impregnated paper types. Does somebody knows such analyser or analytic method for online measurements?
As you know suppliers use different resins to impregnate paper however they are all very similar and is difficult to distinguish between paper from different suppliers.
I would like to thank you for any answer!
Knd regards

 

[Compositepro]

IR or FTIR can distinguish between polymers.