Understanding Graphite Rod Stages in Fly Fishing: A Quick Overview

Question
What is stage 1,2,3,and 4 graphite when it comes to fly rods?

Answer
Hi Don,

This one is way beyond my knowledge of the chemistry involved in producing the graphite compounds used in rod making.  a quick look at Google indicates these terms have something to do with the compound formation, but it's not something I readily understand.  I had never heard the terms before.

Perhaps you would have better luck contacting someone at one of the US based rod factories like St Croix, Lamiglas or Sage.  Joe