This standard specifies a method for determining the pH value of the surface of paper and board under specified conditions. This standard applies to multi-layer paperboard, coated paper and paperboard and other paper and paperboard with special surface treatment.
GB/T 13528-1992 history
2015GB/T 13528-2015 Paper and board.Determination of surface pH
1992GB/T 13528-1992 Paper and board--Determination of surface pH