This standard specifies the method for the determination of the thickness of paper and board. This standard applies to all kinds of single-ply or multi-ply paper and paperboard, but not to corrugated board.
GB/T 451.3-2002 history
2002GB/T 451.3-2002 Paper and board determination of thickness
1989GB/T 451.3-1989 Determination of thickness of paper and board