ISO 534 Paper and board — Determination of thickness, density and specific volume

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This international standard specifies two methods for measuring the thickness of paper and board:

a) the measurement of a single sheet of paper or board as a single sheet thickness;

b) the measurement of a pack of sheets of paper as a bulking thickness.

This International standard also specifies calculation methods for the apparent sheet density and for the apparent bulk density, and for the apparent specific sheet volume and for the apparent specific bulk volumefrom the thickness determinations.

This lnternational Standard is not applicable to corrugated fibreboard. In addition, the measurement of bulkingthickness, method b) above, is not suitable for board.

NOTE The two methods generally lead to different results. These methods are not applicable to tissue paper andtissue products, For tissue paper and tissue products, 1S0 12625-3 should be used.