GB/T 1540-2002: Paper and board -- Determination of water absorption -- Cobb method

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Scope

This standard specifies the method of using the Cobb absorption meter to
determine the surface water absorption capacity of the paper and board (Cobb
value).
This standard is applicable to the determination of water absorption of sized
paper and board surface.
This standard is applicable to the low-sized or porous paper or embossed
paper of grammage less than 50 g/m2; it is not applicable to the un-sized paper
and board, AND it is not applicable to be used for precision evaluation of the
writing properties of paper.

Basic Data

Standard ID	GB/T 1540-2002 (GB/T1540-2002)
Description (Translated English)	Paper and board. Determination of water absorption. Cobb method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Y30
Classification of International Standard	85.06
Word Count Estimation	7,777
Date of Issue	10/15/2002
Date of Implementation	4/1/2003
Older Standard (superseded by this standard)	GB/T 1540-1989
Quoted Standard	GB/T 450-2002; GB/T 461.1-2002; GB/T 10739-2002
Adopted Standard	ISO 535-1991, NEQ
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Summary	This Standard specifies by Cobb (cobb) water absorption analyzer method for determining surface water absorption capacity of paper and paperboard (Cobb value). This Standard is applicable to the determination sized paper and cardboard surface water absorption. This standard does not apply to quantitatively less than 50g/m ^ 2, a lower or more pinholes paper and embossed paper sizing degree; not available for unsized paper and paperboard; not available for an accurate assessment of paper and Writing performance board.