ASTM D 645

Standard Test Method for Thickness of Paper and Paperboard

Name: ASTM D645/D645M-97(2002) Standard Test Method for Thickness of Paper and Paperboard
Developed by Subcommittee: D06.92
Book of Standards Volume: 15.09
Applicable Apparatus: The Frazier Compressometer; The Frazier Schiefer Thickness Tester; The Frazier Differential Pressure Air Permeability Tester
1. Scope

1.1 This test method covers the determination of the thickness of paper and paperboard except electrical insulating papers (see Methods D 202).

1.1.1 Because of the relatively high pressure 50 kPa [7.3 psi] used in this test method, it may not be suitable for measurement of tissue or other soft or low density materials, because the structure may collapse (decrease in thickness) at the prescribed pressure of 50 kPa.

1.2 The values stated in either SI units or in other units shall be regarded seperately as the standard. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

D1968 Terminology Relating to Paper and Paper Products
D202 Test Methods of Sampling and Testing Untreated Paper Used for Electrical Insulation
D585 Practice for Sampling and Accepting a Single Lot of Paper, Paperboard, Fiberboard, and Related Product
D685 Practice for Conditioning Paper and Paper Products for Testing
T411 Thickness (caliper) of paper, paperboard, and combination board
T1206 Precision statements for test methods

Index Terms

caliper paper; paperboard; thickness; 85.060

Testing Instruments: Testing Products