What is the difference between full grey board and grey board ?

Full grey board and grey board called grey board.The big difference are the paper core and
Stiffness . The color for the paper core and surface of the full grey board are the same ,it is grey .  But for the grey board ,they are different . The color for the paper core of the grey board is darker than the surface . Grey board is made of waste paper . That is why the strength of full grey board is better than the grey board .

Full grey board is widely used in high-grade wallet ,folders ,puzzle ,paper hangers etc.
Grey board is widely used in Moon-Cake Box,Gift Boxes etcs.

All in all , the big difference between them is the raw material , the prcentage of the virgin pulp for the full grey board is higher than the grey board , so the full grey board is harder and strength than grey board .